Yep. The idea of a paradox of tolerance is that, if you believe tolerance to be a moral precept, then you inherently will be tolerating others intolerant actions, speech, etc. Not sure why this is a thing, unless it’s meant to dunk on the idea that people should strive for being tolerant of others.

That said, the article is correctly pointing out that tolerance is not a moral precept, but rather a social contract To exercise tolerance need not implicitly accept intolerant behaviors of others. Intolerance exhibited from others is a break in such a contract. The contract requires willing participants in tolerance.