I don't think Trump personally is anti-semetic. But it's pretty common for right-wingers, even neo-Nazis, to support Israel because of the argument "The Jews get to have a state to call their home, why not Whites?"
It really isn't. Where did you get that information?
It's really hard to keep up.
The fallacy here is thinking Judaism and Zionism are related. They're not at all. I would wager most Jews worldwide are not Zionists. What Zionism is is the belief that Jews are entitled to a Jewish Ethnostate and they may create that state through violence and colonialism.