I view all gods as fictions created by humanity to try and explain the unexplainable.
To me, the Christian/Muslim/Jewish variants on god and associated mythology carry no more weight than the gods of polytheistic religions past or present, and the stories of the Bible are just as likely to have occurred as Perseus fighting Medusa, or Loki turning himself into a mare, getting slagged by a stallion and giving birth to an eight legged horse. I find it a bit bizarre that Norse and Greek mythology are treated as 'mythology' (or indeed, as others have said, Santa or the Tooth Fairy) , but Christianity and the like are supposed to be taken seriously.
I mean, let's take the Christian god as an example (as it's the current religion that I'm most familiar with).
He allows the Bible, a tome of staggering misogyny, to hold sway for a millenia or two. He kills the first born children because the rules of their land doesn't do what he's told. He torments Job for a bet. He sends bears to kill children. He doesn't want people eating pork, shellfish, or getting tattoos. He's petty and wrathful.
Then we get to the notion that if you don't believe in this particular god, or accept his son as a saviour, you'll go to hell. Raised in a different religion? Hell! Born in the rainforests of South America with no exposure to Christianity? Hell! Perfectly nice, moral and charitable atheist? Down you pop! Child abuser or rapist that believes and has said sorry? Through the pearly gates you go!
I mean seriously, who writes ten commandments for how people should live their lives, but leaves out 'treating people equally' or 'don't rape' in favour of the first five basically saying, "I'm the best god, worship only me" , etc. He's basically the Donald Trump of deities.