Another mom from the Northeast here, whose California-born son is happy attending school in the South (albeit at one with a huge number of OOS students). My kid is an ethnic Jew who attended Quaker schools and has extended family members of many faiths and political persuasions, so he’s incredibly tolerant of people of all faiths, or none.
I think the one thing that’s been a little surprising to him is how eager everyone is to take him to church. I’m not sure if they’d do that if he were an observant Jew (and his school, the University of Alabama, has a nice, active Hillel on campus), but the assumption is that everyone should go to church and a “good” one at that. (Whatever that means, LOL.) He’s attended some but has no desire to become “born again” or give up his healthy agnosticism.
I think the assumption in the South is that you are Christian, and likely Protestant. Aside from that, and the occasional use of the phrase “Jew him down” (which I’ve heard up here too), we haven’t witnessed any antisemitism.