There is much conflation going on, much of it intentional and sinister, but antisemitism does have a specific meaning & etymology pertaining to Jews, according to Wikipedia:

Due to the root word Semite, the term is prone to being invoked as a misnomer by those who interpret it as referring to racist hatred directed at all "Semitic people" (i.e., those who speak Semitic languages, such as Arabs, Assyrians, and Arameans). This usage is erroneous; the compound word antisemitismus (lit. 'antisemitism') was first used in print in Germany in 1879 as a "scientific-sounding term" for Judenhass (lit. 'Jew-hatred'), and it has since been used to refer to anti-Jewish sentiment alone.

I mean, if we're being pedantic Semite is an ethnic group and since Israel opens citizenship to anyone who is just religiously Jewish and very few people choose to immigrate to Palestine...

It's hard to look at the two countries and say that the Antisemitic group isn't the one committing human rights abuses and war crimes against the country overwhelming made up of Sematic people.

Israel just constantly tries to conflate religion and ethnic groups. I tried to find the racial breakdown of Israel, all I could find was it broken down by religion

Like, if someone with 0% Jewish heritage converts and move to Israel, they're recorded as ethnically Jewish. And supporters of Israel say that justifies them seizing land from the people whose families have lived there for centuries

No, the term was adopted by Jew-haters in Germany because it sounded more "scientific" than the older term Judenhass (Jewhate). Recall, many people once believed that the idea of "race" was a scientific explanation for differences among peoples. They believed that anthropology, linguistics, and evolutionary biology would back up their local cultural prejudices.

However, the German antisemites never cared about Arabs, Ethiopians, or other Semitic-speaking peoples. It was always about Jews: they wanted support for the political position that Europe's Jews were a foreign corrupting influence who should be expelled or killed. "Antisemitismus" was a thin façade of bad social science over a continuation of the same Jewhate that Martin Luther and medieval passion-plays had expressed.

https://en.wikipedia.org/wiki/Antisemitism

I'm pretty sure that using the term "Semite" in any other context than the modern interpretation of "antisemitic", meaining prejudice against Jews, stopped being a thing roughly around the same time that we stopped treating the bible as an authority on the classification of human races. Same with Hamites and Japhetites.

This is an intellectually disingenuous argument that tries to sound like a clever gotcha, instead it's just antisemitic in and of itself.

Seriously? Gonna be pedantic about "semitic" and then intentionally use "Zionist" wrong?