That's Gab's approach. Allow everything that is legal, and crack down on what is illegal. Unfortunately, Gab being perceived as a haven for the alt-right is a self-fulfilling prophecy. The incessant media coverage against it and platform bans (Google and Apple banned their app, Chrome and Firefox banned their browser extension) are designed to scare normal people off from using it (and makes it even more notorious and alluring in the eyes of racists).
If the wider population actually started using Gab and Minds without hesitation like they use Facebook and Twitter, the extremists would be immediately drowned out and only constitute a tiny fraction of 1%, the same as in reality, and their threads would be filled with counter-arguments rather than reaffirmations.
> the extremists would be immediately drowned out and only constitute a tiny fraction of 1%, the same as in reality, and their threads would be filled with counter-arguments rather than reaffirmations.
no they would still be by far the loudest and stupidest, while all the mentally stable people realize that there's no point in arguing with the deranged and find better things to do.
I don't think Facebook needs to host people who's political opinions they don't share but it can be tricky the draw the line.