The quote used on this poster is by Emma Lazarus, from a series of letters she wrote called “Epistle to the Hebrews” in the American Hebrew, a Jewish journal. This quote is from 1883. Lazarus, a Sephardic-American Jew, was an advocate for women’s and Jewish rights and liberation. She is considered a leading “proto-Zionist” and a prolific poet and thinker in Jewish history.

She wrote this quote referring to the plight of Ashkenazi Jews in Europe during the pogroms. The increase of Jewish refugees and immigrants to America during this time would cause anti-immigration legislation targeting Jews. This was her calling on other American Jews to feel solidarity, to have awareness, and to help the Jews in Europe escape from violent persecution.

Here is the full letter it was included in:

“In defiance of the hostile construction that may be put upon my words, I do not hesitate to say that our national defect is that we are not "tribal" enough; we have not sufficient solidarity to perceive that when the life and property of a Jew in the uttermost provinces of the Caucuses are attacked, the dignity of a Jew in free America is humiliated. We who are prosperous and independent have not sufficient homogeneity to champion on the ground of a common creed, common stock, a common history, a common heritage of misfortune, the rights of the lowest and poorest Jew-peddler who flees, for life and liberty of thought, from Slavonic mobs. Until we are all free, we are none of us free. But lest we should justify the taunts of our opponents, lest we should become "tribal" and narrow and Judaic rather than humane and cosmopolitan like the anti-Semites of Germany and Jew-baiters of Russia, we ignore and repudiate our unhappy brethren as having no part or share in their misfortunes- until the cup of anguish is held also to our own lips.”

There is no mention of Jewish people on this poster despite the fact you mention it’s an edit of one from ww2. I do not think I should have to explain why Jews are relevant to ww2.

If you’re going to exclude us, dont use a quote written by, for, and about us.

The original poster from 1943 was made by the United States Office of War Information (OWI), depicts the flags of countries and governments-in-exile who pledged support to the Allied forces. The flags sway above the United Nations' war machine. The United Nations started as a wartime alliance. The Emma Lazarus quote is not in the original poster (which focuses on Allied efforts), so yes the artist of the photoshop added it themselves replacing the pro-war messaging of the original poster.

As @nonbinaryjudean mentions, the photoshop deliberately uses a quote by a (Zionist) Jew for Jews, while erasing Jews from the collective liberation that the art promotes. Perhaps Jews had to be erased to make room for Luigi (yes, Mario's brother, Luigi) to be represented? At least the artist remembered Luigi:

More on the original propaganda piece:
The OWI was formed as a response to how many Americans did not understand or support (many even showing great resentment towards) Allied efforts in WWII. At this point, an isolationist view was popular in the US with many Americans showing great apathy and claiming that "This is Europe's war, so Europe can fight it themselves" - see e.g. the America First Committee, formed in the 40s as a pro-isolationist group:

As seen, the American anti-war/pro-neutrality/pro-isolationist groups highlighted the question of "why should American lives be lost for a foreign battle?". They also organized anti-war rallies like these:

These anti-war American groups were extremely antisemitic and promoted the view that American Jews were forcing America into war and spreading lies about nazis to make them "seem like the bad guys when the really they weren't" [1]. The Nazis' own propaganda machine further amplified this by promoting the view that the Nazis liked the Americans, but American Jews were "tainting" the relationship between Americans and Nazis, and that American Jews were "brainwashing" American youths to be anti-Nazi, e.g. through the comic industry [2].

[1] Many American Jews were understandably very anti-Axis and many even conscripted to fight in the war against the Nazis before the US formally joined; American Jews would conscript to foreign militaries to fight nazis - e.g. the French foreign legion, the Canadian forces (Canada joined the war in 1939), as well as the Lincoln Battalion which fought nazi-backed fascist in Spain. This is not even counting all the non-American Jews who volunteered in the fight against fascism and nazism. So many Jews (both American and non-American) enlisted that they became majorly disproportionately overrepresented in the fight against fascism and nazism.

[2] An example of this is found in the SS newspaper "Das Schwarze Korps" article "Jerry Siegel Attacks!" (April 1940) - English translation archived https://web.archive.org/web/20150626231453/http://research.calvin.edu/german-propaganda-archive/superman.htm:
As you can see, they really want to ensure you know that Siegel is a Jew (both referring to his circumcision, calling him an Israelite and Sadducee, and giving him a new middle-name "Jerry Israel Siegel") and furthermore they want you to know that this Jew is poisoning the minds of American youths with his "Superman" stories.

Jerry Siegel, an intellectually and physically circumcised chap who has his headquarters in New York, is the inventor of a colorful figure with an impressive appearance, a powerful body, and a red swim suit who enjoys the ability to fly through the ether.

The inventive Israelite named this pleasant guy with an overdeveloped body and underdeveloped mind “Superman.” He advertised widely Superman’s sense of justice, well-suited for imitation by the American youth.

As you can see, there is nothing the Sadducees won’t do for money!

Jerry looked about the world and saw things happening in the distance, some of which alarmed him. He heard of Germany’s reawakening, of Italy’s revival, in short of a resurgence of the manly virtues of Rome and Greece. “That’s fine,” thought Jerry, and decided to import the idea of manly virtue and spread them among young Americans. Thus was born this “Superman.” On this page we present you with several particularly unusual examples of his activities. We see Superman, lacking all strategic sense and tactical ability, storming the West Wall in shorts. We see several German soldiers in a bunker, who in order to receive the American guest have borrowed old uniforms from a military museum. Their faces express at once both desperation and cheerfulness. We see this bicepped wonder in a rather odd pose, bending the barrels of Krupp guns like spaghetti. “Concrete can’t stop me,” he shouts in another picture as he knocks the tops off pill boxes like overripe tomatoes. His true strength only shows itself in flight, however. He leaps into the air to tear the propeller from a passing German airplane. As we can see from the next frame, however, Superman has apparently made a mistake, since he seems to have encountered a Yid pilot. No German would say what the pilot says: “Himmel! Vos is diss?” [3] The American answer “Well, here it is” seems to us not quite right. The right response would be something like “Laff if ya likes, I’m Simple Simon!” [4] .

A triumphant final frame shows Superman, the conquerer of death, dropping in at the headquarters of the chatterboxes at the League of Nations in Geneva. Although the rules of the establishment probably prohibit people in bathing suits from participating in their deliberations, Superman ignores them as well as the other laws of physics, logic, and life in general. He brings with him the evil German enemy along with Soviet Russia.

Well, we really ought to ignore these fantasies of Jerry Israel Siegel, but there is a catch. The daring deeds of Superman are those of a Colorado beetle. He works in the dark, in incomprehensible ways. He cries “Strength! Courage! Justice!” to the noble yearnings of American children. Instead of using the chance to encourage really useful virtues, he sows hate, suspicion, evil, laziness, and criminality in their young hearts.

Jerry Siegellack stinks. Woe to the American youth, who must live in such a poisoned atmosphere and don’t even notice the poison they swallow daily.

[3] Jerry Siegel's version of German is more akin to Yiddish, which he was a lot more familiar with than actual German. Although one must wonder if it was a deliberate decision to retain Siegel's yiddish-esque German exclamation instead of correcting it to "proper German". Nazis hated Yiddish and as seen in the article, it pisses them off that anyone would make them speak Yiddish - it hurts their German pride. Siegel himself in his memoir state that him managing to piss off the Nazis so badly that they wrote a whole article bashing him is one of his greatest prides in life.

[4] The translator notes that this translation is their best attempt at translating “Se wern lachen, jach bin der klaine Moritz!”. First of all, this is "mauscheln" = speaking German with a Yiddish accent. Furthermore, I think that "Simple Simon" misses some important context; Moritz (along with "Itzig" and "Mauschel") is a pejorative nickname/trope used by Nazis to denigrate Jews. Moritz is an old German name, and when Jews tried to assimilate into German society in the 19th-20th century, they often adopted Germanic names to replace their Semitic ones (this is why you have many Ashkenazi Jews who have Germanic sounding surnames "Goldstein", "Rosenbaum", etc. instead of the more traditional Jewish naming convention of "bar"/"bat" [son of/daughter of] followed by the parents' names). Nazis and other antisemites used the name Moritz to belittle Jews and remind them that "no matter how much you assimilate, we will always know you are a Jew". Another Nazi newspaper, Der Stürmer, often used "Moritz" to refer to Jewish people. The point of referring to Jews by their "Germanic names" was to highlight that Jews were conniving, untrustworthy, duplicitous and foreign, no matter how long their families had lived in Germany or how assimilated they were.

Anyway, this was a long reply.