“Bad societal consequences” is entirely subjective, though. This is the crux of the issue.
On one hand, you have someone who says that exposing children to sexual or violent content can have an impact on them. This is something that has been studied, sociologists, psychiatrists, doctors, ... have concluded that this is true.
On the other hand, you have someone who says that an ideology they don't like will lead to the ruin of the society. At the same time, communities, and often whole countries themselves, don't see the problem with these ideologies, and the catastrophe that this person has predicted does not occur. The only reason they claim that is because they are intolerant and want to impose their ideology, not because they want what's good for others.
So, yes, there are __some__ subjectivity. The same way that there is subjectivity around "good and bad" and yet "murdering" is universally considered as "bad" but "not going to the catholic mass" is not.
Societies that practice(d) slavery and human sacrifice clearly do not share such a "universal" value.
A murder is specifically an unjustified killing. And as far as I am aware it is universally considered bad. Which makes sense because murder being considered bad is pretty much baked into the definition.
I can’t think of a modern society that does not condemn going into a random person’s house and killing them. Nor any past ones for that matter.
Now in some backwards ass country they might not consider it murder if that random person was homosexual. Or a killing might be justified in the context of a revolution. Or to bring rain. Or when shooting some guy fleeing with your tv in the back.
Sure, "murdering" is not "100% always in all circumstances considered 100% bad" (but I still think that "universal" was not a bad choice, the same way "universal healthcare" does not mean there is no illegibility criteria and therefore exceptions). And of course, there is a lot of discussion to even have on what people mean by murder, but that is, again, missing the point.
But that is totally ridiculous to then pretend that it means that "murdering is bad" has therefore as much legitimacy as "touching your nose with the left hand index finger is bad".
The fact that is subjective does not mean that you cannot say anything anymore. It feels like a common bias in "technology" people: some of them think they are so smart and are condescending to "social science", and yet they are lost on concepts that social science considers as obvious.