Very true. In the USA we have freedom of speech but not freedom from consequences of that speech.
"From what I've heard, he didn't say or do anything controversial;" - This line in your post suggests that you didn't undersand that he lied about the alleged shooter's motives on purpose to defelct the blame of his own ideology.
I prefer no one be censored, but losing your job because you are a lying hack that provides little to no value to news or entertainment doesn't seem unfair. It feels like a natural consequence of lying and manipulating your viewers.