Christians are no different than others in their weaknesses. Intolerance is everywhere, we can't seem to escape it at times. The biggest stumbling block I had coming to Christianity was some of the things that were done by the Jewish people in the old testament.
You claimed that Hitler was a Christian, a person can claim to be anything, there actions prove who they really are. Paul said if we don't have love we are a soundless gong, meaning there is no validity to our claimed faith. Christianity isn't about rules, it's about learning to love God, yourself, and others and considering others just as important as yourself.
I made my assumption of you based on some of your comments, and I wondered if you had been hurt at some point by Christians.