That sounds similar to the saying that you can tell who your masters are by who you are allowed to criticize. And it also sounds like you can tell who your masters are by who you are not allowed to make fun of. Which is basically the same thing as outright criticism.
It goes even beyond that. The inability to laugh or enjoy humor is much like a bitter disability. They are blind, and resent horribly the ability of others to see.
In socialists, this is compounded because of their obsession with herd-like “equality” in all things. They think it is *unfair* that someone else can see or have a sense of humor, and they cannot.
Importantly, having such an inflexible and brittle reality only appears to give them structure and strength. In truth, if anything “breaks” their reality, they have something much like a mental breakdown. Some are even forced into their underlying schizophrenia.