That article is a joke. The author didn't tell us what questions the teens were being asked.
It also didn't specify if the teens were talking about the US administration or Americans - and I'd be willing to bet good odds that they were generally talking about the administration. Because in Canada we have a lot of American tourists and they're just like Canadians for the most part - although they can be a little more obnoxious and demanding of the service industry than Canadians tend to be. (Likely because the majority of tourists we identify as Americans are the extremely wealthy ones - everyday Americans tend to blend right into the mix.)
This portion of the article:
These teens appear to equate George W. Bush and Americans with Osama bin Laden and Hitler, although it is unknown if the teens polled would describe the latter two as being evil.
is purely to stir the pot. Canadian teens are generally fairly up to date on global affairs, and to make a statement like that is just STUPID - plain stupid.
While Canadian textbooks certainly don't celebrate the American military to the degree that American textbooks do - the Americans are still painted as Good Guys in a historic sense.
The statements about Conservatives wanting to adopt an American-style health care system...Well our health care system is something that Canadians take very seriously. The fact that we don't have to be rich to be entitled to quality health care is something that sets us apart from the US. It says that everybody's life is worth the same amount, regardless of how much they earn. Saying we don't want a health-care system like the US has doesn't mean we hate America, it means that we don't like the US healthcare system.
Saying the you hate George Bush and this administration, doesn't mean that you hate America.