Subject: Re: How to Stand Up to a Dictator
Governments are under no obligation to shelter political parties bent on the destruction of the democratic underpinnings of the country.

Of course, this is the weakness of many democracies. In the name of “democracy” they often give legitimacy to authoritarian parties that will dismantle democracy if they are elected.

Yes, Karl Popper call this the Tolerance Paradox.

"The paradox of tolerance is a philosophical concept suggesting that if a society extends tolerance to those who are intolerant, it risks enabling the eventual dominance of intolerance; thereby undermining the very principle of tolerance."