Well he's partly right IMO that it would have detonated all that stored resentment that reactionaries have towards the "liberal leftists" (they rarely make distinctions) and (((the elites)))
But uhhhhh having Trump alive and able to instead further foment and concentrate it towards his political enemies is much much much worse.

It's like saying that a powder keg exploding is dangerous therefore we should be glad all that powder is instead in the guns of our enemies...