This guy right here (in the video below) explains the difference between Zionism and Judaism perfectly.
Remember, Judaism is a religion. Zionism is a racist supremacist genocidal radical political ideology hellbent on the holocaust/ethnic cleansing of Palestinians (who are actually Semites). And most importantly: Not all Jews are Zionists, and not all Zionists are Jews. There are plenty of Christian (and even Hindu) Zionists, aka the Evangelicals.
In essence, Zionism is itself Anti-Semitic. Too bad so many Jews & Christians support this unethical and unjust doctrine.