Who gets to decide what's WRONG?
You'd say "God." Problem-
so did everyone you cited as being religious in the wrong way. So do the people that stone women to death for being raped. Etc.
Since God isn't in the habit of popping in and saying "hey, you're [censored] up", what you have one way or the other is the word of men. No more, no less.
You can get morality from that, in a roundabout and extremely complicated fashion.
I'm not actually an atheist, but I'm an agnostic, so most of the people that annoy me in that manner just lump me in.
