If God, Jesus, the devil, angels, and demons were all real, we still couldn’t rely on the Christian Bible as gospal (pun intended) — it was written by humans, specifically men, who could have misunderstood or invented things. Think of it like the Snyderverse in Man of Steel: Superman is portrayed as a brooding, violent character — but that’s not his true nature. In Batman v Superman, Batman is straight-up killing people — also not his normal characterization.
So even if much of the Bible reflects real events or real beings, parts of it could still be distorted, exaggerated, or entirely made up by the people who wrote it down.
I’ve thought about this a bunch. The christian god being omnipotent and benevolent is contradictory to the bible and also just the state of the world. So what if there actually is some god (or multiple) but these entities are far from omnipotent, really can’t meddle all that much and maybe don’t really care in the first place.
I don’t think it’s true (even if it seems more plausible than any religion actually being completely right) but it’s just funny to me to imagine that all religions could just be the result of some higher dimensional beings playing with our planet out of boredom, and humans just ascribed far too much power to them.