A good example is the May 24 article "Anti-Zionism Isn't Anti-Semitism? Someone Didn't Get the Memo" by New York Times columnist Bret Stephens. Stephens cites example after example of anti-Semitism and anti-Zionism.
Yes, it's true that some people who criticize Israel for its mistreatment of Palestinians are anti-Semitic. No question about that.
But what's important to keep in mind is that critics of the Israeli state are not necessarily anti-Semitic simply because they disagree with policies of the Israeli state. Some people have nothing against Jews but, at the same time, vehemently disagree with the Israeli government's policies toward the Palestinians. The mere fact that such people criticize the Israeli state does not convert them into anti-Semites.