There is no such thing as superiority of a belief. A thing is either true or it is not true. If you believe in something that is true, you are right. If you believe in something that is false, you are wrong. This isn't about such vague comparitave terms as "better" and "worse." It's about specific absolute terms like "right" and "wrong." I believe I am right. If someone tells me that I am wrong I can do one of two things. I can refuse to enter the debate because I know I am right. But that doesn't give me the opportunity to find out that I may be wrong and I always hold that possibility. The other option is to present my case and find out whether I am right. If I prove I am right, by necessity I prove the other viewpoint wrong. Is being right superior to being wrong? I don't think so. I think being right is right and being wrong is wrong. Do you hold a different opinion?
Over the centuries, Christians have killed and coerced in the name of God far more than any others, though Moslems are probably a close second here.
Actually, unless you have some numbers to back that up I think atheism, specificaly communism, holds the crown. Stalin is responsible for the deaths of over 100 million. If you match that number we'll move on to the second highest communist killer. I won't even mention the 40 million aborted in the United States because I don't need them to make my case.
You also made a point about the original purpose of this post to show how peaceful Christianity is. I think the original purpose of this post is to counter the mantra we're hearing from the administration and the media that Islam is a religion of peace. From my brief reading of the Q'uran (I've only just started) Islam is a religion of the meandering thoughts of Mohammed. There is peace and war there. Christianity and Islam speak for themselves. The author of this peace just wanted to make sure they were both being heard properly.
Shalom.