I don't believe thinking about doing that is very unusual. Especially if you have every actually been a victim of violent crime. Most of us have a conscience and empathy that keeps us in check. We understand the horrible consequences that acting on those thoughts would bring.
Its normal if u dont like the person. I have thought of over 200 scenarios where this douche at school and his dumb friend getting killed and just them too. If its just anybody then maybe look into it.
You need to talk to someone. Do you have this rage because of something bad that happened to you in the past? If so, it sounds like you may not have dealt with it. Is it still happening? Please get help. You are not weak or crazy. It takes a lot of courage to do it but you deserve a lot of respect if you do.
I've thought about this sort of stuff as well......I've even gone as far as to sort of plan how it would be done and where.......committing the crime isn't the hard part anyways, it's the aftermath of the whole thing......like actually getting away with it or not......or how exactly your mind would be able to deal with actually taking a person's life.....
dw i think everyone gets that at some point- ik i have thought about that when i am really angry and i just wanna smash somebody-i don't of course because thats morally wrong, but i guess you will learn to control your anger and stuff if you think about it just normally then you should probally go to a doctor or something.....:P