[Sorry for the boilerplate apologism but it's in my contract.]
I'm an atheist, but I can call out logical flaws. I'm not advocating, just enlightening. If one is going to reject something, it should be for valid reasons, not misconceptions.
There is no shred of proof that we really have free will but that's beside the point.
Yes, it is. (beside the point).
The fact is that people who believe in God are brainwashed.
This is merely rhetoric. No response necessary.
Killing is wrong, whether God commanded it or Hitler did.
By definition, God is not subject to right or wrong. God
defines right or wrong by his actions. There's no such thing as judgement
of God.
(Whether or not god exists is another matter, but the above would be true if he did.)
The Old Testament is proof that the God Christians believe in is not loving and peaceful.
No one ever suggested God is loving and peaceful all the time. God, especially the Old Testament God, is wrathful.
Essentially, he has one requirement for humanity. Love me.
He wants us to do it of our free will. But at some point, he sees his creation go off the rails, gets angry and does some housecleaning.
You express a very simplistic impression of God and it's a
strawman. You are taking up arms against a self-manufactured position that does not exist. Proponents of God do not profess the views you ascribe to them.
What you're doing is the parallel of what Creationists do. They get a simplistic, wrong idea in their head about the opposing argument (evolution), then attack that.