"Christians(as a whole) aren't having an issue with killing themselves"
I believe a history lesson is in order! In the 80-years war entire cities were burned all inhabitants killed just to make sure the 'heretics' (read: protestants) wouldn't get out alive, and when it came to "innocent" non-'heretics' (read: Roman Catholics), the excuse was "God will separate them Himself". Many wars led by Christians have been "justified" back then as "God wills it".
Christianity too has a big long history that is covered in blood, death, and sexual abuse, and we try to sweep that under the carpet, and that is something the people who turn terrorist "in the name of Allah", hold against us. The body count over entire human history may actually be higher in the Christian side. Also I did some research about the jihad, and found something about the jihad not being allowed to be used out of retribution, revenge or will attack others for own gain. Only to defend your own lands. That sounds different than what ISIS claims, eh?
There is however when it comes to terrorism and Islam another crux. The people live in a situation that is not very good, and there are also issues older than Islam that still plague them too. When wanting to use violence to change that you need something to bind people and religion can do that, that's its power and weakness. Since Islam is the greatest religion there, boom, there you go. If they were Christian, they'd have abused the Bible like they are now abusing the Quran. The number of Muslims choosing the terrorist path is even pretty low, compared to the total number of Muslims world wide. The issue is that those terrorists are the ones who dominate the media, and thus their message and propaganda reaches us and creates the global opinion. Not the way the majority lives by.
There are certainly a lot of points in the Islam that should be criticized, but Christianity and other religions are no different. The "perfect religion" cannot exist. But we should also watch out. By hating Islam or Muslims, we give the terrorists the perfect thing that allows them to carry on in their violence: A reason!
No I ain't a supporter of any religion. We simply cannot judge an entire population and their culture and religion, for what a small group of idiots do. I wonder if I can even write that body count on the name of Islam... But rather on the name of the terrorist organizations themselves.