This young man looks like a very pleasant young man to me, with no ill intent toward anyone, I think this is a clear cut case of good ole boys from Georgia taking the law into their own hands, if I was a young black man and white men in a pickup truck with shotguns was chasing me, I would most def. try to get away from them and if that failed I would try to fight my way out, and it looks like that is just what he did. I believe he is innocent, and the perpetraters are evil people, with malicious intent.
I'll give some credit that you say you'd try to run away, that in my opinion is more reasonable whether you are up to anything or not than the ones that are so deluded they suggest that you should rush at and attack a person with a gun and find yourself dead in their self defense. Though I am surprised no one would just at least stop and hear what they gonna ask or pull out your phone and call the cops yourself. Then again the much hated and old tapes of the assailant's past run-ins with the police which are come out probably rule out him calling them.