Free speech isn't an absolute all or nothing. In fact,
all countries that give the right of free speech, and the UN declaration of human rights, impose limits on it.
For instance, outright neo-Nazism is forbidden in most EU countries. Same goes for stoking racial or religious hatred, etc. Even in the US with their old constitution and "textualist" interpretations of it that really want to take it to the absolute, have restrictions on free speech (e.g. "obscenity", "speech that violates intellectual property law", etc.)
Absolute free speech is incompatible with a modern society of today. Maybe it isn't with somebody's utopia, but we're not there.
The paradox of tolerance, however, is real. You can see it in work the recent rise of mis and disinformation from far-right folks, Russia, etc. For instance in France there was a presidential candidate who was convicted of inciting racial hatred more than once, and wanted to deport all Muslims and migrants from France, of course with frightening stories about why that is necessary to save France from the Muslims/Blacks/Arabs/Jews/whatever.