How to offend a Canadian?

I paused this morning over the obituary of Chris Hayward, because the headline said he created The Munsters. What a curious legacy. But it turned out the most interesting thing was related to his work as a writer on the Rocky/Bullwinkle cartoons:

Mr. Hayward worked on all the segments but was most closely associated with “The Adventures of Dudley Do-Right,” which followed the hapless royal Canadian Mountie in his ceaseless pursuit of Snidely Whiplash, a very naughty man.

Because the Dudley Do-Right segments were deemed harmful to the national esteem, the Rocky and Bullwinkle shows were initially not broadcast in Canada.