Smith wrote:
I don't think it would automatically be against the law even at a rally. You'd have to tell people to go out and start burning houses down for it to be inciting hatred.
Well, I don't think Keegstra ever told his students to go out and attack Jews, or commit any other sort of crime for that matter. As I remember from following the trial as a kid, the prosecution was really focussed on just the promotion of hatred itself. I recall they were very interested in questioning a student who was rumoured to have referred to himself as a "Jew-hater", as if that woulda been some sorta smoking-gun.
If someone is telling people to go out and start burning houses, I assume that's covered by the laws against incitement, full stop, never mind hate-promotion. Though I suppose if you combined the two(eg. "Hate 'em AND burn their houses!!"), the authorities could get you for both.