No, obviously not. Some so-called "Christians" serve the same "god" these blood-thirsty killers serve. Many terrible things have been done in the name of God and religion--no question about that.
I believe in God. But if the concepts of "God" and "Satan" are used as symbols of good and evel, you gotta admit that those terrorists are serving "Satan" and not "God", no matter what they may profess. Right?