Semitic is race. Judaism is a religion. Religion is a cultural phenomenon. Zionism is intrinsically linked to the religion and historically has been an incredibly fanatic cult very willing to do anything to reach their final goals. I think hatred of this is far removed from any kind of racism.
E: and the conflation of Zionism with Judaism is something I see consistently coming from zionists, so it being being deemed a trait of anti Semitism doesn't make sense to me for several reasons. I'm an atheist though so generally have no respect for fairytales that send people psychotic...
Two birds with one stone