There may be only one Koran, but there is no one authority for interpreting it telling the masses to kill infadels. That's why so many Muslims live peaceful lives without having a crisis of faith over it.
That doesn't give us leave to persecute all Muslims.
You judge a religion by it's source documents and beliefs. Compare what is done vs. what they are told to do. If you read the entire New Testament, you won't find a single example of a Christian killing someone, ordering others to kill anyone, killing someone because they don't believe or forcing someone to believe. Not one.
Please show it, if I'm wrong
Christianity at it's most extreme is just as disgusting as Islam as it's most extreme. They can also both be moderate, it depends on how passionate you are about your religion.
If someone were to judge the United States according to it's founding documents, they'd have a hell of a time matching the reality to the theory.
Have you read the entire New Testament to look for commands by God or Jesus to believers to commit acts of violence on non-believers?