Three distinctions:
One, yes, some people have done bad stuff while associating themselves with Jesus. But they end up quitting it after a while. Unlike islam.
Two, it can be debated whether those who did bad stuff in the name of Jesus were really followers of Christ. In islam, true believers do the worst stuff.
Three, those who do bad stuff in the name of Jesus are going against his teachings and example, and scripture. Unlike islam.
Don’t forget, it was a long time ago when that crap happened. Obama should stick to what he knows; sodomy.