What if we, for a second, suspend disbelief and agree that the Christian god is real?
So, there's this superpowerful magical being that nobody but his special friends can see, and he wants to take over the United States and unleash a bloody apocalypse that will pretty much kill everybody so that he can rule forever and ever.
That pretty much describes Vecna from the latest season of Stranger Things.
We're lucky this god is just as fictional as Vecna. Why would anyone worship such a monster?