Dude, it has nothing to do with being anti-Semitic. Check what party most Jews in this country vote for. By this logic, American Jews are anti-Semitic against themselves. Israel is criticized for their settlements, and you know that. And that has absolutely nothing to do with Judaism in any way, shape, or form.
But you also didnt explain why Republicans love a foreign nation. It is weird, especially considering like I said before, Republicans should hate their actual government policies which are far closer to Democratic positions than Republican positions.
I'll give you this. There is a difference between being anti-semitic and being anti-Zionist. That being said, it's hard to understand why jews would be anti-Zionists. Given their history and belief structure I honestly dont understand why a Jewish person would oppose Israel in any way. Just from a historical perspective, if a person who is Jewish opposes the state of israel it kind of undermines their beliefs. Imagine a Muslim who said "meh, Mecca isn't really that big of a deal, but I'm still Muslim". These things are integral to their faith so I can't see how someone who is faithful to their beliefs could just dismiss them.