It's disheartening and sad that people still cannot differentiate between these 3.
Jews are the people, an ethnicity. It's an ethnoreligious, which means an ethnic group of people whose members are also unified by a common religious background. And look what else is listed as ethnoreligous..
Judaism is the religion.
Zionism is is a form of nationalism of Jews and Jewish culture that supports a Jewish nation state in territory defined as the Land of Israel. Zionism was established with the goal of creating a Jewish state.
Which mean, a jew might support zionism. In fact, it might be the opposite.
So before you become an antisemite, think again.