On the one hand, I don’t mind greater scrutiny with such things. I wouldn’t want people tarring all Palestinians by calling them Hamas either.
On the other hand, I can really see this silencing legitimate criticism.
Believing there is a huge problem with people who advocate for Israeli supremacy and criticizing them for it is not an attack on Jews. In fact, as a Jew, I have met a hell of a lot more non-Jewish Zionists than Jewish ones.
The problem is when both bigots and Zionists themselves assume that any Jew (or Israeli) must be a Zionist.
How do you fairly moderate which is which without inserting your own political beliefs about Israel into it? I have no idea.