I think anti-semitic is the wrong word, but they make a good point about the claim "Jews are only safe in Israel" which is very obviously not true.
Jews live extremely safe lives all over the world, particularly in Europe and North America. In fact, they're far safer there than they are in Israel. Jews might face anti-Semitic discrimination in those countries, but you certainly don't see 1000 of them die in a terror attack like just happened in Israel. They aren't under threat of rocket fire from Hamas or Hezbollah every day.