Several of you are missing the point. It wasn't the choice of language that the pilot was using (not entirely anyhow), it was his obviously emotional state. As a passenger you have a vested interest in your pilots emotional health and have every right to ask a question if it regards safety.
A few weeks ago a
pilot flew his light civil into his mother in law's house, on board the plane was his 8 year old daughter who was also killed. As a passenger how do I know this pilot isn't that upset? Hell, as that guy's copilot, how do I know he's not that upset.
Further, going off on a passenger is totally unsat. I wasn't there and I don't know what the passenger said but unless it was extremely offensive to the pilot he should have handled the passengers questions in a professional manner. You work for the passengers, your job is to get them from point A to point B safely. You are also a professional - act that way. According to all of the articles I've read, and I take them with a grain of salt, this pilot was out of line.
Let me as y'all this, as professional pilots both military and civilian, if your copilot or plane commander was obviously distraught over something say a bad divorce or the loss of a family member, something like that, would you want him to fly with you? What about during a war and you need to put steel on target? How about during a repo in CONUS?
This wasn't about what he said specifically, it was about the pilot's emotional state. If the articles are accuarate, he was obviously not focusing on his job, his preflight, or safety.