I agree that they cannot let such a statement slide, and that is why I said it, because nothing else I said in the week before this was acted on. I was ignored in every other plea for some sort of intervention. My manager could, though, have simply asked me if I meant that and I would have explained that, no, I was just upset. We could have walked over to the person I was even referring to and worked it out immediately on the spot. I told him about when I came back to work and he was sad and had no hard feelings towards me.
I agree no company would allow it. They would look for a legal way to get rid of anyone saying such things. I told them as much. That said, listing that as the reason for termination is not legal. I did do my job in a professional sense. Freely sharing what I believe to people who listen is free speech. You cannot legally be fired for your opinions that do not affect your work; at least not as the listed reason.
I could have simply been terminated with no cause listed. That they did not due that is great; but it was not out of any caring for me. That is simply the way the company works; which I agree is a good thing.
The worst part is that my story is not unique. The level of stress and resulting poor mental health is, in my opinion, very high there. I don't think they are doing what is necessary to improve that. ( despite trying )