Is it responsible for people to be talking about ideologies that have violently destroyed the lives or livelihoods of hundreds of millions of people? Should we censor positive talk about communism, socialism or ideologies rooted in such, since these can lead to more violence? Isn’t that kind of speech also hate speech? Maybe it depends on which group is in power at the moment. It can get relatively subjectively violently bloody messy. So, keep free speech free!