There's absolutely zero evidence that anyone knew before he was invited. And after it was revealed, not one political figure in Canada has said something along the lines of "good people on both sides".
As a Canadian sure it's a guff, and the guy paid a price for his mistake and didn't fight it, but compared to America I'll take shit like this 8 days a week.
Hexbear and Lemmygrad can ligma balls. Fucking scum of the internet.