You can search or browse the Koran here.
Search your favorite version of the Bible here.
Try looking up “kill” in each.
To be fair, the Old Testament is also full of nasty, violent stuff. The big difference between Christianity and Islam is that the former has been through a reformation and tempered by the Enlightenment. In other words, most Christians just ignore the parts about destroying the enemy, stoning women, etc. Lets hope Islam catches up soon.