User blog comment:Tommy,Klaus&Kol2012+/A question about chucks death/@comment-3169324-20200209225841/@comment-3169324-20200209232608

They didn't even portray him as omnipotent, and when it comes to writing, portrayal is more important than mere claims.

Furthermore, you really gotta learn to separate real-world lore from the show. Just because a character's name is God doesn't mean they're based on God from the Bible. For example, Leviathan in the Bible is more of a giant sea creature, as opposed to shapeshifting human-eating monsters. Hell, Castiel himself literally said that the Bible gets more wrong than it does right; that should've been the end of it.