People do go to Facebook for their news. Whether you like it or not, or think those people are fools, it's true. What Facebook decides is deserving of censorship matters because we have to live with those fools.
Comment sections on news outlets can remove whatever they want, I don't see why it'd be any different for Facebook, if you genuinely consider them a news outlet.
They have behaved a certain way for their 15-20ish year history, and I'd argue that it was mostly as a neutral platform for communication, not really anything resembling a publisher, and they've gained an enormous userbase under this model. I think this is the correct way for a platform like facebook to operate, and that's in part why I use their platform.
I don't welcome them deciding to fundamentally change how they operate and begin filtering more content, especially due to what I view as partisan political reasons.