What do you think he should do that wouldn't benefit from getting over it? Having his kids take karate, for example, would probably be an even better idea if he wasn't still full of anger. It seems like the only benefit of this kind of anger is collective: it might motivate him to take some kind of action to improve the situation for everybody — but he doesn't seem to be doing that.
Oh, and the swastika was on the street, not on the lawn.
On the street in a very dry environment. Even if done on the street, in most every place in the US it would be treated as arson with a hate crime enhancement.
What good would going to the reunion do to him? Speaking out about this, would on the other hand do him-- and others-- very well. Writing can heal old wounds.
Oh, and the swastika was on the street, not on the lawn.