Any of you think you could kill someone

Has there ever been any1 in your life that has fucked it over so bad you think you could kill them? I feel that way but im tryin to hold in my hate thoughts.. i dunno if i can tho or do i just say fuck it and move on with my life..

I have tried slicing a man's through before, but as I was slashing, a friend was pulling me away, the blade came less than an inch from his throat. He shouldn't of hit a woman in front of me, though.
After a bunch of friends pinned me down and took the knife my brother went up and pistol whipped him twice in the head.

But yes, I could kill someone. Not a problem.