A very significant number of self-described "christians" have indeed behaved wickedly.
Though, percentage-wise, the most violent record belongs to the self-described "atheists."
I agree with you. As I am sure you agree that much of the violence by "self-described" muslims can be put to the same comparison.
I do encourage you to search out and read some of the threads that accurately reflect what the Koran includes in terms of ruthless violence against non Moslem believers.
There really is good scholarship tracing the religion back to a demonic moon god with all the related horrors associated with demonic forces.
It really is a major tenant of that faith to forcefully, ruthlessly, brutally conquer the world and exterminate nonbelievers.
Christians believe the God of the Bible will end up removing all non-believers/rebellions against Him. However, Christ clearly taught that those who lived by the sword were likely to die or would die by it. The resulting cleansing of the world, as it were, is not up to Christian humans but up to God's angelic forces and supernatural power.
That's a huge difference. I hope you can learn to understand that difference and appreciate its significance for society and the world.