From Judges 9:23:
God sent an evil spirit between Abimelech and the citizens of Shechem, who acted treacherously against Abimelech.

This quote justifies that the Christian God is in fact evil. Why else would a deity apparently have "evil spirit" minions at his command?

And that's just one of the things in the bible. Even Noah's ark story in itself shows how evil Yahweh is. To quote Al Pacino in The Devil's Advocate, He gives man instincts. He gives you this extraordinary gift, and then what does He do, I swear for His own amusement, his own private, cosmic gag reel, He sets the rules in opposition. It's the goof of all time. Look but don't touch. Touch, but don't taste. Taste, don't swallow. And while you're jumping from one foot to the next, what is he doing? He's laughing his sick, ******* *** off! He's a tight-***! He's a SADIST! He's an absentee landlord! Worship that? NEVER!

So in short, god drowned every human on earth except for one guy and his family, because of things he made them able to do. And to make it even better, he killed every animal on earth too (except for the ones brought on the ark), for the sins of men he made. Really, Hitler pales in comparison.