As a man, do you feel you could kill pretty much any other man?

I was walking down the street today and a woman was headed directly towards me, I stepped out of her way. Then there was a guy walking towards me, I walked into him. It was at that point that I realized I could probably kill any male of our species if I had to or even if I just felt like it would serve some purpose. I don’t feel good about this feeling and that is why I am asking this question. Am I alone in this or do most men feel this way? I feel no aggression towards women or kids or handicapped males but when it comes to adult males it’s amazing but beneath the surface of my being there is a madman ready to pounce on any man I feel is threatening me or trying to diminish my social status.