This is not the point OP is making. The point is that there is deep divide, and this is populist move from once side trying to remove one of the contenders from the race (ironically, dems would be better off if they would allow Trump to run since then they are likelier to win).
This move is extremely dangerous since it is directed on ex-president. If presidents know that once they will leave office others side would come for their head, guess what, they would not leave office. Dictatorship, police state, potential civil war, and risk it for what? For getting cheap brownie points agains washed-out politician?