I think a very important nuance here is that it is not enough to just tell other people to commit crimes against people from a religion/race/color/gender/..., i

I think a very important nuance here is that it is not enough to just tell other people to commit crimes against people from a religion/race/color/gender/..., it must be suitable (I have trouble translating here) to be effective in that matter. The reason is explicitly the human rights, because nobody should fear to be harmed because somebody told other people to harm people from a certain gender/race etc. There are BTW other "Äußerungsdelikte" (statement offenses, free translation), like slander and deformation. All these are based on the human right that no harm should be inflicted on you because somebody says something wrong about you (in a very simplistic way, you normally would have a lots of hours of law lectures just on this offenses, their reasoning and distinction).