Goodness, it's hard to keep track of what I want to write about sometimes. There'll be thought experiments late at night, or while driving, and there's no guarantee it'll pop up later.
Regardless, this is one I had, and it is based on how children in a playground don't make full use of the playground unless there is a fence. If there's no fence, they clump up in the middle, as they are unsure of boundaries.*
Moral relativism removes that fence around right and wrong, and you know what I see happening? I see a very, very vicious in-group policing whenever someone dares set foot outside the inner group. If you disagree with your peers on a topic, you will be heavily pressured to censor yourself.
Contrast that with Christianity even within a denomination. There can be a rather wide ranging degree of opinions on basic to very complex theology, but as long as the predefined boundaries are not crossed then you won't be expelled or branded a heretic. And even then during the history of the Church, potential heretics are approached first and are attempted to be reasoned with, so it's not an immediate excommunication for misspeaking during a sermon.
If those without defined morals (i.e. SJWs and those of the like) step out of line, the guilty party has to excoriate themselves immediately, no excuses. There is a single-minded direction which is almost unnatural to the observing outsider.
*Unfortunately I can't find a specific name of whichever study determined this as everyone who recounted it was as vague as I was just there, but that's fine as I'm using it as a metaphor anyway.