Well let's not lose sight of the fact that Christian's had a little help from Jesus. A peace loving hippy who went around saying things like "love your neighbor as yourself", "return evil for to evil to no one", and "be peaceable to all men" kinda goes a long way. To be fair, I find myself complaining a lot more about how Christians DON'T follow Jesus rather than the ways in which they do follow the guy.
But conversely, Muhammad was a war lord who said things like "lay in wait to attack the poly theist", "kill apostates", and "wage jihad against the non-believer". We are genuinely terrified when Muslims act in accordance with the founder of their religion.
There's no two ways about it. Any reform of Islam is going to have it's work cut out for it. And is going to have many challenges Christianity simply didn't have not the least of which is that Muhammad claimed to be the "final revelation". While I appreciate the work people like Maajid Nawaz are doing I sometimes feel that an outright rejection of the Quran and organized Theism would be far more effective instead of trying to reinterpret dogmatic scripture.