Fits asked Is Christianity good for the world and points out a few "isolated instances" of so-called "Christian" atrocities.
Preemption aside, these are isolated instances which are recognized as not Christian behavior and are condemned by the Christian world at large.
The difference between Christianity and Islam is very clear. And here it is.
Christians are taught to "Love the Lord your God with all your heart and with all your soul and with all your strength and with all your mind'; and, 'Love your neighbor as yourself."
Furthermore Christians are taught to "Go into all the world and preach the good news to all creation."
Whereas, Moslems are taught to go into all the world and kill everyone who doesn't agree with you, unless they submit to becoming slaves to their Moslem masters, in which case, it's still okay to kill them if you feel like it.