Why would I tolerate a blatant falsehood?
> that does not exempt them from being the actual publisher, and all the rights/obligations that go with it.
With respect, you're totally misinformed. Social media websites do not fall under any kind of "publisher" obligation, this is a totally made up meme that people spread online.
Now, if you want to argue that we should change the laws so that these websites would fall under some kind of publisher obligations, I would disagree, but that would at least allow room for "tolerance of other people's point of view". However, in terms of the actual law you and the parent are unequivocally incorrect.