>>775570This is the same argument made by religitards as "without God, everyone becomes depraved animals". Criticizing moralism as an idealist mental construction heavily affected by ruling class ideology isn't the same as saying "I don't mind anyone doing anything"
You don't need to invoke moralism to say "I don't want a society where people can freely rape, I want rapists to be punished". This is a statement that is fully moral-free, it is simply an expression of one's desire. Moralism would be instead something like "my holy book said rape is bad so we should punish rape", or "rape is against human nature and therefore should be punished" or "we should follow the maxim of do unto others etc etc". All of those are moralist statements because they invoke idealist constructions like philosophy, religion, "human nature".
When Marxists criticize morality, they bring the real human interests and desires out in the open by cutting off the idealist justifications that mask these desires. The result of doing this is that it exposes the hidden conflicts in society, and these conflicts are hidden by bourgeois society because it wants to maintain social peace so it can peacefully exploit the proletariat.