The law itself does not equate to murder. There are reasonable situations in which stand your ground protects a person exercising self defense. It's hard to pass judgement without being there imo... did he actually intend to harm the driver? Would you rather wait until the driver was dead to find out if that was the result? I wouldn't... if I was the driver of course.
There is some irony in this case... this time it was a black guy shooting a "white-hispanic". The shooter has yet to be charged and is not in jail. No white militant groups (or white-hispanic militant groups... do those exist?) have publicly placed a bounty on his head. No massive marches or rallies. No reverends. No US presidents claiming he looks like their son.
In situations where a person is clearly acting to protect him self where failure to act would have, without question, lead to his death, the odds are overwhelming that no charges will be filed because no one would ever convict. If your story doesn't pan out, you have a problem. This is good because it prevents unevolved shaven primates from solving all their problems by shooting at them.
Any law that says it is okay to kill someone because they aren't around to tell their side of the story is an atrocity. You do not have a right to immunity from investigation and questioning to confirm your story. The law, again, is an atrocity, and the people who voted for it are sick.
Under the stand your ground law, you could walk up to any person on the street, start an argument with him, and as soon as it escalates to the point you can pretend you feel threatened, you can pull out a gun and shoot him. This is not a matter of gun rights, it is a matter of the law being criminally unjust.
You want to talk about situations? How about this situation, you get into a fender bender with some guy in traffic, he hops out of the car and empties his gun into your car, killing you, your wife, and your children, then when the police show up he says "he had been tail gating me for a while, I thought he was following me, and then he crashed into me I think he was trying to run me off the road, when I got out to assess the damage and confront him, I saw him holding something, I thought it was a gun, I had to act to stop him from shooting!" Man is, of course, lying through his teeth, but as you and your family are now rotting corpses, there is no one around to challenge him. So he goes free, and you go in the ground.
Stand your ground. The ground it stands on is cemetery dirt.