A laughter will bury you all

Anarchists say: "a laughter will bury you all": Of course, before them all must die, and here opinions diverge. Communists think that it would be better to kill them, or at least to make theyr death easier, whereas anarchist believe overall that it is better to let them die by themselves. Who is right?

By the way, there is a Jew saying that says that the world will end in the smile of a wise.