So, firstly, the definition of Zionism is simply the belief in the right of Israel to exist. I’m pretty sure what you’re thinking of is Kahanism, the extremist belief that any non-Jews in Israel are enemies and should have no political rights and/or should be removed. This is what people are generalising as Zionism, and while it is a subset of Zionism, it is a very extreme and fascist subset of it.
If your first question when you hear that someone is Jewish is about whether you should deem them “evil” or not - because that is what that is, trying to see if the Jewish person in question support the atrocities being committed by the Israeli government simply because you found out they’re Jewish - is inherently antisemitic, as your first instinct was to question their morals just because of their ethnicity. That is prejudice, and it is not okay.
It’s like asking a furry if they’re a zoophile, or a gay person if they’re a groomer. Just because there’s association in some people’s heads doesn’t make it okay.
If your first question when you hear that someone is Jewish is about whether you should deem them “evil” or not - because that is what that is, trying to see if the Jewish person in question support the atrocities being committed by the Israeli government simply because you found out they’re Jewish - is inherently antisemitic, as your first instinct was to question their morals just because of their ethnicity. That is prejudice, and it is not okay.
It’s like asking a furry if they’re a zoophile, or a gay person if they’re a groomer. Just because there’s association in some people’s heads doesn’t make it okay.