You may be right but I find deliberately driving into someone else's car even under times of stress immature.

So he admitted he can't control his frustration, how mature not.

We probably did have a hand in enslaving many of them but some also gained freedom and became slave owners in turn. Freedom has been a thing for nearly 200 years surely after that length of time personal responsibility has to be taken.

They don't seem to be seeking reparations from the African countries involved. Also we spent a fortune to buy their freedom, distasteful I feel, but I suspect that the anti slavery laws would not have been passed without this concession.