Should a Christians be Involved in Martial Arts then

[JesusFan]

You mean Brazilian jujutsu (BJJ), not kick-boxing. There is no special "Brazilian Kickboxing" that I know of. BJJ is mainly for competition: submission matches and MMA. Other than that, falling down on the ground when you are attacked? Not bad against one opponent when there are rules, but you're dead if there is more than one attacker. As for calling it "brutal," it is that in the sense that any MMA style is brutal--chokes, joint locks mainly. BJJ fighters in the UFC have to have extra training in striking before they are effective. Thai kick boxing (Muay Thai) is the go to art for that for many of them, or boxing--which has its limits for MMA.

Israeli Krav Maga has that reputation, but I've never trained in it so I can't say.

You are right about that Jujutsu, as have heard that it can be a very dangerous martial art for inflicting large damages on someone else. What about that art that Steven Segal is supposed to be into? Think real truth would be like the scene where that big guy was coming at Harrison Ford with a big sword, and instead of his cord , used his gun for the instant kill