While there has never been a shortage of antisemitism in this country, it should not be conflated with antizionism.

Well, there's an argument that "antizionism" without qualification is antisemitic. It's an argument that Jews - unique among all the peoples of the world - do not have legitimacy to want self-governance of a nation in the area to which they are indigenous. It's okay for Palestinians to want their own homeland (or the Indians or Pakistanis or Japanese or the Danes or whomever), but not Jews. Independence movements throughout history have legitimacy - or at least are not to be condemned - except for Jews.

One can certainly make specific criticism of the Israeli government, of course, without that being anti-Semitic. One can indeed make tons of criticisms of the specifics of how Zionism was implemented over the last century or more. Etc.

The term "antizionism," of course, is a disputed one. If it's being against the very idea of the Jewish people having their own state in their indigenous homeland altogether as being illegitimate, then it would certainly be antisemitic. Singling Jews out alone for that disability, while allowing it to all the other peoples of the world (including the Palestinians), is antisemitic. Criticisms of the specific historic political project by which Israel was created and has been governed would not necessarily antisemitic, but the term "antizionism" doesn't necessarily limit itself to those types of criticisms.