I don't think you understand. There is a difference between being Jewish and being a Zionist. When you are expressing antisemitism, you are including Jews all around the world and in Israel itself who are not Zionists or are anti-Zionist. That is racial hatred without due cause. When you talk about Zionism, you are describing Israelis, some of whom are not necessarily Jewish, who you believe are treating Palestinians unfairly. Do you see the difference? So when you have a caricature that shows a Jewish face, you are expressing antisemitism, not anti-Zionism. That means you are including the liberal Jewish university student who is fighting on your side! That is racial hatred. That is antisemitism.
Just as the Charlie Hebdo crowd attacked and potentially offended all Muslims instead of just attacking ISIS.