"When was the last time you heard someone from France say they wanted to be American and take a bite of something of ours?"

says as explicitly as it can be said "the French hate us (or resent us or despise us) but now, for the first time, it's not the case"

1. no, the French don't hate or despite or resent Americans. The fact that such a belief is propagated by "even" Garrison Keillor (whoever that is) suggests that it is widespread. Such supposed hate or resetment makes it easy, in turn, to mock, belittle and generally ridicule the French and, occasionally, like in 1995 or 2003, engage in fullblown vile, hateful campaigns. In other words, we're a convenient scapegoat/enemy, and a carefully cultivated one;

2. that you don't see this casual hatemongering just shows how omnipresent and accepted it is, and it would be unthinkable, and untolerated for pretty much any other sub-group of population - which I take as a compliment that we don't need protection very much, and as a sign of latent racism as well (the French, they can take it, as opposed to [insert other minority group]); French-bashing is politically-correct-compatible, and is thus an outlet for other frustrations;

3. no, Obama's election has not miraculously solved all problems, and made America again the shining city on the hill, however much you want to believe. It does not make you superior to the French or to anyone else.