Being Jewish, and calling oneself “pro-zionist” offers some protection in such matters, but only some.
King was pro-Israel and pro-zionist, recognizing much anti-Zionist rhetoric as anti-Semitic.
The belief that Jews should have their own nation; Jewish nationalism. Zionism gained much support among Jews and others in the early twentieth century, and the hoped-for nation was established in the late 1940s in Palestine, as the state of Israel. Zionism is opposed by most Arabs. (See Arab-Israeli conflict.)