First of all, not all theists, in my experience, believe in the exact same things. Me, I don't think God would punish people for the 'slightest deviation from acceptable behaviour'.
Second of all, don't generalize. I'm aware that there are many self-proclaimed 'Christians' who oppress minorities, but not all. So please, no ad hominem :)
Once, I've had thoughts of doing that. Never actually did, but I was in a bad enough state to want to, just to make a message of how my pain isn't something I can just 'suck up because others have had worse'. Kind of to say that my mental health was deteriorating so much that I would be willing to.