Humans, as I'm sure you would agree, have free will, and are thus responsible for their own actions. If I tell you to buy shares in a company, and you follow my advice, I can not reasonably be held responsible if the shares decrease in value. Similarly, if I tell you to murder someone, and you decide to do it, I can not be held responsible for your actions. The same principle applies to advocating mass murder ideologies such as socialism or fascism; the ones carrying the violent deeds are the ones ultimately responsible for the infringements on people's negative rights. No?
You don't get to go around and say that people's rights don't exist. This is morally relativist bullshit. Furthermore there should be no way at all that these first principles can be violated while in government. It's because people like you entertain free speech to these psychopaths that we are in such a mess today. What about the responsibility not to lie and incite violence, theft and murder? It goes on and on. You are just enabling psychopaths.
Socialism is nothing but an ideology of theft and murder anyway. It has no business in a system based on natural rights, because it teaches people that those rights don't even exist in the first place. This is essentially arguing for slavery. That is certainly not negative liberty. It's a form of positive liberty to excuse this sort of behaviour. Go out into the streets today and do the overt version of this by arguing for black slaves again. See how far you get. What is wrong with punishing people that make such claims? Absolutely nothing at all.
Sorry, but you need to grow a moral backbone, and I hope you will carefully reflect on what it takes to uphold natural rights and negative liberty.