There's also the possibility that killing him might backfire, turn him into a martyr.
I'd imagine if he was killed we'd see some Kristalnatch type shit.
I doubt it would be that bad. I could see some "reprisal" attacks here and there, but all over the country? That seems unlikely.
I suppose it maybe no "Kristalnatch" it would be more like roving gangs of neo-Nazis carrying out reprisal killings.