I'm not sure exactly what he meant, but it could be that he meant in general, and not on the forum per se. There are... were... many people from that era who developed a real hatred of German people, even Canadians of German descent, without regard for their individual political views. People who develop intense prejudices tend not to be the sort to be very understanding of other people's perspectives.
I grew up in a community with that has a large number of Mennonites, including Russian Mennonites who were harshly persecuted under Communist rule. So when Germany invaded in 1941, they saw the German people as their liberators. Some of these people, although not Nazis, may have occasionally spoken favorably of the German invasion, and of Hitler even. Mainly because of what they endured under Stalin. To them, Hitler was the lesser of the two evils. Even many German nationals felt a rekindled sense of national pride when Hitler began to defy the western nations in the years leading up to WWII. So they might make reference to how they felt about Hitler then, at that time. You could probably understand that if they expressed their views to the wrong person, they might easily be labelled 'Nazis' or 'Nazi sympathizers', even if they weren't. It's quite possible he was making reference to that sort of prejudice in general, and not specifically to people here.