Why do some people think that this guy doesn't have the right to sue?

I just saw a clip from the Faux News show "Kelly's Court", in which the host and a couple of panelists discussed a recent lawsuit in which a former Wall Street trader is suing his former employer for firing him for being a vegetarian. Apparently, when the guy's boss found out that he was a vegetarian, he began to constantly har him about it and he even took to calling him a ""! (By the way, the vegetarian guy is straight and married!) It's obvious that the boss created a hostile work environment in this situation, so why is it that the host and the panelists of this show made light of the situation and mocked the vegetarian guy? After all, I'm sure they wouldn't exactly take kindly to being mocked for their dietary choices or being falsely accused of being gay!