So I thought about this in the shower amd it makes sense to me, like praying and stuff never worked for most people I know, so a direkt link to god gotta be unlikely. That made me conclude that religion is probably fake, no matter if there’s a god or not. Also people speaking to the same god being given a different set of rules sounds stupid, so at least most religions must be fake.
It has nothing to do with belief(although I’m sure some militant atheists chose to use lowercase universally, they’re likely just grammatically ignorant) . It’s noun vs descriptor. Abrahamic God (and Muslim doesn’t matter either… it’s the same entity in all three) is literally it’s name. A proper noun. In your example of Thor, god is just a description, not his proper name. But Thor is not a good example as he’s actually a demigod, but demigod is never capitalized as there is no god called “Demigod”. Odin is the god of war and the dead… and ruler of valhalla as a more accurate entity to discuss.
God is a god. My god is God. Both of these previous sentences are grammatically correct. The Bible itself even makes these distinctions. Example:
John 10:33-36 (KJV):
Other sources agree.
https://www.learnreligions.com/god-or-god-to-capitalize-or-not-to-capitalize-249823
Other examples of the phenomenon… “The other day, Mom cooked with the other moms.” You call your mom “Mom” as a proper noun. Where mom is a general descriptor for the other women your mom was cooking with. “Is she your mom” vs “Mom is calling for you”.