Twitter Has the Right to Suspend Donald Trump. But It Shouldn’t

>Twitter to enforce a rule that bans Mr. Trump’s tweets but does not also censor speech generally. Given that we are now entering an era dominated by right-wing nationalism, these rules could well come to backfire on the progressives urging Twitter to suspend Mr. Trump.

When was it decided that only political agendas and ideas other than "right-wing nationalism" are allowed?

Democracy is about including all kinds of speech, including "right-wing nationalism" and "left-wing cosmopolitanism" or what have you.

If non-right-wing-nationalists legitimize the banning of right-wing-nationalist speech, then if right wing nationalists come to fashion/power they'd be justified to ban left-wing/progressive speech too.

That's not exactly a democratic path.