I don’t fully understand the issue - yet - however it predates the NYP article. Neither Facebook or twitter are immune from harm principles, so using their powers to influence or censure free speech might land them in hot water.
maybe just another sideshow, maybe not. Still a big hairy deal.
It's so sensitive that the Democrats tried to impeach Trump when his administration started to look into it. This is the way liberals react when you're getting too close to the truth.