Is it normal that i dont react to killing and death of people?

I've seen videos of people being behead in videos that Iscis put up. I watched them but I had no reaction they grabbed their hair and slowly lowered them to the ground while sawing at their neck while they were still alive. Even when they placed the soldiers heads between there body. None of it bothered me. Even all the blood and sounds of cutting them off and threw the spin didn't bother me. Also I have dreams about killing people and Im never scared I just watch people dieng. Truthfully its quite boring. Normal?