Am I going insane or crazy?

I just got through with watching horrible animal cruelty videos. I hate everyone of these rotten people and wish them dead. I already hated people before but it seems I have a deeper hate. People annoy me so much I come home from school screaming. And it's getting worse, little things like slow people walking in front of me at school tick me off no end. I thought it was only because I was just not a people's person, but I literally want to kill them now. I just watched the video of some freak throwing puppies into a river... that makes me want to rip her head off. People tell me if I start having so much hate now I'll wind up a murderer. Also I've become very violent in the past years. I haven't gotten in any physical fights, but I wish I could everyday. I don't think this anger and hatred is normal because I even once imagined a bomb that would blow everyone up. So could anyone help explain what's wrong with me? Is this anger just because of the hate i have towards animal abusers and inhumane people?