Since one might read this and concludes "tolerance is impossible.". You cannot tolerate intolerance, thats the contradiction here and not tolerating intolerance is a fairly easy escape out of the dilemma, at least for me.

Edit: This dilemma arises whenever your ideal is dependent on the cooperation of others. Pacifism is another example. So you cant uphold your pacifistic ideal in the case of being attacked. Or you might loose the option to enforce peace when it only depends on you cooperating, upholding it. This is a perspective many people rejecting ukranian aid dont consider (but are eager to push out nazis because they are intolerant).