Einstein was a strict determinist. He didn’t even believe that God had free will.
I enjoyed a scene in the Einstein series it had him meeting the King of Austria or Germany for an appointment at the university, the king asks him: are you afraid of God? Einstein said, I am terrified of him.
Einstein was a strong socialist. Atheism comes with socialism.
Did Einstein think his brothers were forced to go into the business of selling coffee and bagels?
I think you’re sorta right, but wrong in general. It would be more accurate to say he thought God incomprehensible by the scientific mind. Here’s a longer article by Einstein on the subject:
https://www.sacred-texts.com/aor/einstein/einsci.htm