Grifter, you seriously need to start learning about actual history. Your ignorance is really telling. And yes, to everything you mentioned religion was a major part, or thee major part of everything you mentioned. Your actual level of practical knowledge on this subject, coupled with your atrocious grammatical skills peg you at about a 6th grade education. Rely on your brain, not god, mmmkay?
And I've never played any of those games you mention save DOOM, and those were extra-dimensional creatures, not demons from hell. And again, those games aren't about indoctrinating anyone, this one is. Jesus, man, learn to think critically if you can.
"You have enemies? Good. That means you’ve stood up for something, sometime in your life."