OK, this is in Canada, and I freely admit that I don’t know much about Canadian law.
In the US, though, the line between ‘opinion’ and libel / slander is pretty wide. Where’s the line in Canada?
My understanding is that it is more like English law- the standard of proof is somewhat lower than American.
However, this jerk is largely basing his pending complaint on what others wrote, that he took umbrage with.