I first heard this expression from a Jew, as I told you 90% of what I've learned and over the years about Jews in the Levant is from Jews. I intentionally made that choice early on, asking "what do Jews think of Israel" in order to minimize antisemitic biases.
The fact that you are surprised tells me that you've been very selective in the sources you use to form your views, you rely on simplistic Zionist fairy tales and you don't even have the self respect to question or cross check what you've learned.
Here, this is prepositioned at the point that "Jew supremacist" is explained to Rudy Rochman who was also as naive as you are, listen to the explanation and you'll learn something today:
Obviously, Jews like Chomsky are not antisemitic therefore I cannot be antisemitic if I repeat their claims.