` :If he's a TRUE socialist/Marxist, then YES he would be an atheist per pure Marxist/Communist doctrine, believing religion to be ``an opiate of the masses`` and counterproductive to the class struggle. However, it's not confirmed that he is an atheist so we better not start speculating, even though there's a good chance that he is since he's a socialist. It's important to note that his HERITAGE is Jewish though; this is more about ethnicity than religion, however. He is a JEW but doesn't follow Judaism, the traditional religion of the Jews.   `