Countries in Europe (and most of the world) have positive constitutions, which defines what the government "must do" (for its citizens), whilst the USA has a negative constitution that defines what the government "cannot do" (against its citizens).

What constitutes hate speech is carefully defined in the constitutions of EU countries. Politicians can't just amend or extend the definition at will, except in the UK which has a strange system of laws and not a constitution like you're used to in the USA or in the EU.

In Europe we recognize that Hitler came to power by abusing free speech, which is why using the same rhetoric now can land you in trouble with the law. We also recognize that the pen is mightier than the sword and that unfettered speech can be used to persuade groups of people to use violence against other groups of people.

Hitler was literally banned from public speaking for two years.

The Nazis came to power through widespread normalized political violence, not speech, and banning Hitler from speaking did nothing but further undermine the legitimacy of the government’s mandate to rule.