Spoken like a true liberal. A person has the right to defend themselves even if they managed to piss someone off to the point the other person attacks them physically. If your life is in danger you have the right to use deadly force to protect it. You are saying that "no, a person doesn't have that right if they pissed the other person off". As for having a CCW escalating the situation that is pure BS, concealed means just that, concealed. Apparently the law knows the guy isn't guilty of murder or he would have had his CCW pulled by now.
Stand your ground laws are good laws and have reduced the crime rate in Florida, and other states, by a huge amount since being enacted and have saved many lives. People with your attitude don't belong on a conservative forum.
The analysis isn't whether or not the other person got angry, it's whether a reasonable person would perceive the exchange as instigating or asking for a fight. Some people use anything as an excuse to get angry, that is, they come to anger unreasonably.
From my impression of how the physical confrontation started, I don't think the "stand your ground" principle is in play, at all.