[Natsu]

Mentioned how? In which countries? In the USA, 'hate speech' is simply not a category of unprotected speech under the 1st amendment as it's understood today:

https://www.washingtonpost.com/news/volokh-conspiracy/wp/201...

https://www.popehat.com/2015/05/19/how-to-spot-and-critique-...

An example of a category that is not protected in the USA would be death threats or false & defamatory statements.