Holocaust denial is pretty specific in comparison.
The more I investigate "where to draw the line", the more I'm convinced we aren't capable of doing so in a just fashion.
That's the thing with neonazis. They are 100% in agreement about ethnic violence. It isn't a side effect of their belief system. It is the core of their belief system that undesirable people should be murdered.
What left wing groups would you consider banning?
There's certainly precedent for holocaust denial being considered specifically and uniquely harmful, although it feels a little dated in the year 2020.
As far as you question goes to some extent yes. I wouldn't want to see some sort of litmus test for groups that clearly aren't purely a hate group.
A specific christian identity group (randomly made up here) that is hateful, no problem with removing them. All Christian groups, no.
Why wouldn't it be OK to ban a belief system that specifically discriminates against an innate feature?
There is a difference between groups with some questionable beliefs about others, and those whose groups are entirely about hating other people.
As an atheist, I do find them a hate group. Are you going to declare militant atheism intolerant, or religion?
I don't know what "militant atheism" is though.
> This heavy-handedness isn't an encroachment on free speech but a necessary impediment to keep the spirit of free speech and free society intact, one where the tolerant voices aren't drained out by the relentlessness and irrationality of the intolerant.
Could easily be used to ban Islam on Facebook. Or Scientology. Or far left / far right governments. Or Antifa / Proud Boys / other vigilante groups. Or popularly supported groups with a fringe element (BLM). Or free market capitalists, or communists.
As one should already gather from reading above, I am not suggesting that Facebook should ban any of these.
Ultimately every group doesn't tolerate something, and this argument could be used to ban them.