So, basically, if you tolerate the intolerant, the intolerant will eventually wipe out tolerance.
A more accurate way to say it is, "if you tolerate the intolerant BEING intolerant, intolerance will eventually wipe out tolerance."
It does not say you should be intolerant of the intolerant while they're minding their own business. I just think a bar owner is free to kick people out for representing Nazis purely because it's their bar and they can do what they want.
But X's problem is a bit different from the Nazi Bar problem, in that you don't really see the Neo Nazis on X sitting there minding their own business. You ONLY see them voicing their intolerance. Which of course, should not be tolerated.