They did introduce him as fighting against the Russian in WWII... It's easy to put all the blame on a single scapegoat, this is the results of a lot of incompetent people. Shameful moment.
It's a shame westerners love to paint everything with a broad brush and don't look into details during WW2 in territories between Nazis and Soviets.
Why did Trudeau call it Russian propaganda when confronted about it, even if we assume that he magically didn't know anything about the guest?