Zionism is a fundamental Jewish right. To be anti-Zionist means you are denying that right.  

What Is Zionism? Why do so many people oppose it?

Israel’s Ambassador to the United Kingdom Mark Regev defines it accurately: “Zionism is simply the right of the Jewish people to national self-determination.”

Why should Jews be denied that right?

“We should all be proud to call ourselves Zionists,” Regev declared.