Sounds like people want to both get praise (or upvotes, depending on forum) for spouting the prevailing views (or the insular views of their bubble, whichever), but not having to deal with any inconvenient disagreements. Whatever that is, it is not a “conversation”.
Then don’t. But that’s not a “conversation”. That’s just lecturing.
Also: Who is the arbiter of what is, and isn’t “objective” truth? Reasonable people sometimes differ.
Also also: The “truth” in this case was “the word ‘groper’ is always offensive, no matter where it is used”. Which I certainly could see reasonable people disagree with. But nope, that obviously merited a straight block.
[0] https://arstechnica.com/tech-policy/2013/03/how-dongle-jokes...