Basically. Forcing them to disseminate it infringes Facebook's freedom of the press. Or freedom of association; there are arguments to be made in both directions.

Not really. You would think in a forum full of techbros, FB being a private entity would be the end of the discussion. But because it's white supremacist viewpoints that many of the forum users are sympathetic with, it gets moved into a conveniently gray area.

This accusation is severely dishonest and in bad taste. It is a character attack when substantial discussion is warranted. It allows you to undermine opposing viewpoints without examining them. You're accusing people of abandoning their stated principles for nefarious reasons. It is toxic. If you want to have productive discussions with people you'll be better off not labelling them as evil from the outset.