The anti-religion of Marxism has numerous and various sacred texts, schisms, doctrines, pseudo-scientific theories, and ways of killing its victims. The most widely used method of silencing those who dare disagree with Marxism has been to starve them to death.
I don't care whether they call themselves evolutionists or revolutionists or advocates of imaginary "social justice." All they've ever worked for is the raw power to turn most people into serfs of the state and murder the rest.