Free speech in the US is about not having consequences for what you are saying. In particular not having consequences from the government. Therefor you can only say that it is a legitimate consequence if you disregard free speech. Free speech in the US is about being able to be an asshole to 10%, 50% or 90% of the population without having to be responsible for what that part of the population does. And even more so what they do with the government. As such if you believe in free speech the government's actions stand on their own. What you actually don't get to say is that it is a consequence. Because that is what free speech in the US is supposed to prevent. Consequences from the government.
In many countries in Europe we have hate speech and defamation laws, we don't have at-will employment and many of our universities are public. This means there is less freedom to make others upset, questioning someone's character, firing them and ways to affect our education. This is by definition illiberal. (Worse or not is an open question). In Europe we can't say that "I might have offended 50% of the population, but sending me to prison is worse" because our laws says it isn't. In the US you can.
Does US law also say that the government can do all kinds of things, including pardoning criminals? Yes, but it still goes against the credibility of free speech in the US. One of the things the US still had over other countries.