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Marxism has a long history of democide/genocide and violent revolutions that usually result in authoritarian totalitarian governments worse than what existed before.
Captalism enforces private property rights through violent means also.
Marxism in practice requires riling up the lower classes and whipping them up into an emotional frenzy in order to bring about a revolution. This always results in violence and literal class warfare. Marx himself spent his life trying to do this and advocated for it.