For those who don't know who Ben-Gvir is, this guy is pretty terrible, (archival link here,) probably the worst in Netanyahu's administration. He calls for war crimes, he has framed pictures of Jewish terrorists on his wall, his politics could accurately be described as Judeofascism. He's Israel's National Security Minister which means he oversees Israel's police and prisons, it would be best if he wasn't involved in government at all but at least he's not waging this war.
I don't think it's accurate to say that he's not waging this war, if only because he's very clearly directly implicated in the ongoing violence in the west bank.
More accurately, he's not in charge of the IDF. There are accusations that he instructed police to turn a blind eye to settler violence, which would be very on-brand for him. I think it would be better for everyone, especially Israel, if this guy wasn't representing them.
He's responsible for genocide. There is no karma that could possibly balance that out. It wouldn't even be karma if an IDF soldier mistook him for a Palestinian and shoved a bayonet up his ass.
The worst thing that happened in this case is that the innocent law-abiding driver of the other car is badly injured, possibly with multiple fractures. I don't see how this is a case of bad things happening to bad people. Even multiple fractures are too lenient for this PoS.