There is a minority of Americans who dislike America too. In all fairness to the writer his opinion seems to be based on dealings with his fellow academics. He would hear just about the same views at most U.S. universities.
I understand and agree with your point. The problem is that the author projects those attitudes on Canada and Canadians as a whole and then ignorant people (a small minority in each country, I'm sure) will pick up on it and run with it to foster their anti-Canada rhetoric...
One would have thought that the Conservative movement would be relatively free of such ignorant folks, but I guess not..