Just read a lot of the VideoLeak comments.. Damn, I am concerned on how people think nowadays.
They are pretty much saying that it was fine. I mean, the dude starts arguing with the woman, gets pushed and shoots dude to the chest because he "feared for his life". Same argument can be said with the woman: she was approached by an angry man and so she feared for her life and her man pushed him.
If a guy like that has a reputation for confronting people over parking spaces, how can you really justify this? He is abusing his CCW by knowing that at any point in time he can shoot someone because he "feared for his life".