Christian and muslim question....many christians refer to the page in the?

qu'ran which says kill all infidels....without looking at the verses before and after, and also without including the context of the verse. In the bible it says exactly the same '' suffer not a witch to live '' what is a witch ?? someone who blatently doesnt conform to the rules and beliefs of christianity. it still states kill a witch who is obviously an unbeleiver..so whats the difference ?? to me the bible has far more bloodshed and death than anything else i ever read in my life.