The wikipedia page on his religious views is pretty explicit on these points. He gave some interesting quotes, but ultimately he didn't believe in a personal god and called himself an agnostic. That actually makes him a Deist, which is fine.
Believing in a god that created the universe doesn't hurt anything. It's a harmless belief. However, it is not scientific to believe that god regularly changes the rules of the universe in order to help or hurt individual people or groups. It's not testable, repeatable, or falsifiable. Believing in something like that is the opposite of being scientific.
To be fair, I'm pretty sure that people can compartmentalize. A person can have strict scientific beliefs when working on their car's engine or when writing code or designing electronics and then still believe nonsense about things they have no personal control over.
It's fine to believe religious nonsense about biology just so long as you aren't a doctor, biologist, or voter.