The Soviets were in certain ways very Conservative on a number of (not all) moral and cultural issues, while also very “secular” (non-religious) on others. Abortion and divorce were fine for example, “gay” was not.
Stalin was more “socially conservative” than Trotsky. That’s why liberals still adore Trotsky to this day.
I say the only good thing Stalin ever did was to kill that bastard.