Black, white, red, yellow, brown. Racially motivated or not. My $.02:
-Would it matter what color the guy was, unless and if the news had identified the possible suspect as a white male, and the father/son duo still reacted the same? A question we won't know the answer to. Robbery suspect apparently already identified as black, whether it was this guy or not. Racism likely in this case for several reasons, but not likely the root cause other than "he looked like" the black male that was a potential suspect. They didn't attack him specifically because he was black. There's arguments both ways on this.
-Is it common for people that jog frequently to wear what appears in video clip to be cargo type shorts. IIRC, when I ran track, and at other times, shorts not meant for running or jogging chafed the crap out of my legs. So, was victim as family says, or was he legitimately the suspect? And, was it common for him to jog in this neighborhood and did he live reasonably close, as runners do clock different mileages when they run. But, most have preferred and consistent routes. If there was legitimate concern he was the suspect, they were not in the wrong to follow him until LE could arrive and check him out. It would not be racist to ask LE to check this guy out even though he is black. If the current alleged suspect was identified as black and they are looking for a black, why would you approach a white? Racism would be, the suspect is black, this guy is black, must be him. Must have been a composite released because they said it looked like the suspect.
-A lot of subjectivity in my first two points. However, the two white men were not LE. They were not on their personal property. They were armed, in a vehicle, in pre-meditated pursuit, apparently with intent to harm as it appears in the clip. They did not inform LE they were following said suspect from a distance in order for them to arrive and do their job, which would have been the right way to handle their suspicion of this man. I have no clue if these two men would have reacted differently toward alleged suspect if he had not been black. If it were common for this man to frequently jog in this area, they would have at the least recognized him as such. However, regardless of victims color, the two men created a bad situation with their actions, were not in danger, and totally screwed the pooch with their vigilante justice. It will be a travesty if nothing comes of this. The victim, if he was indeed the bonified suspect, deserved his due process of law. He did not get that opportunity.