Marx's Manifesto infamously claimed that religion is the Opiate of The Masses.

However, given that Marxism's adherents insist on its implementation despite its repeated, proven, and epic failures, Marxism itself is a system of faith.

But while "traditional religion" as "opiate" produces a society which is slow to move way from tradition in preference of a relative sense of peace, calm, and order, the Marxist faith induces irritation, agitation, irrational behavior, the sacrifice of one's own and not one's own wealth to its pursuit; fear, paranoia, delusion, senseless violence, and, in extreme circumstances of the economic dislocation which it causes, death and even cannibalism.

So, furthering the Marx's own analogy: Marxism is the Bath Salts of the masses.