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.

Yeah I’m sure the speaker couldn’t wait to be ridiculed and resign. Intentional career highlight for sure.

I'm also wondering what was going through the veterans mind. Did he just think the world was now honouring nazis? Did he think they knew or didn't know? Why didn't he decline??

Canada has a long history of accomodating nazis.