Of course it is possible the OP was lying, but I see no reason to doubt what he said. What is he going to gain by lying? A bit of support and sympathy for something that did not happen? Even if he did get them so what? If it never actually happened, then no one is going to get the sack or otherwise disciplined. Even if it were a hypothetical scenario a discussion can still take place. Those who have been around long enough and are sensible/reasonable all appreciate that the majority of staff are friendly with a few rotten apples here and there but very much in the minority, and they definitely exist. That is not going to change because of a few isolated stories. As for those who hold extreme views, well who cares what they think?
Question the OP, yes, by all means, if you wish to, as long as it is done amicably, but in the absence of anything to suggest the contrary, I see no real point to disbelieve what he said.