Sorry, then. Yes, God created Stalin and Hitler through their parent's sexual cooperation. But that does n;t make God responsible for, and themselves not responsible for, the evil that they did.
If they cooperated with Satan in committing their crimes, they did so of their own free (yes, God-given) will.
That God permitted it, has to do with His preference for free person,s as opposed to robots or puppets. That they were defeated, has to do with brave men and women who likewise are responsible: willing cooperators with God, for the protection of the innocent and the defeat of the depraved.
It's good that we can disagree...but then again, it must be the way God wants it.