...when one sees advocacy of racial genocide.
ETA: since I'm being accused of lying, here's further evidence of violent psychopathy.
ETA again: he's learning. Here he's using passive voice rather than threatening me directly (or his own mother), but he still reveals that he has a very dangerous lack of understanding on the proper use of violence. In this case, I think this threat falls into the category of resorting to threats when he loses any debate, just like Democrats cry "racism."
The link in which I challenge him to make me a liar is, of course,
this one. Needless to say, I would love love love to be wrong about him... but after this period of time, I'm afraid we have our answer.