He's a communist. He has no true religious faith of any kind, other than Marxism. Commies use religion only to help advance their anti-American agenda. They have a (temporary) "unholy alliance" with the islamo-fascists, as both want the US destroyed. Should it ever happen they'll go at each other's throats.
Everything he says and does informs his islamism, and I believe he’s smart enough to know that fealty to a deity will win the day over fealty to any human god. Even him.