Why do so many Americans dislike the French?

I always thought the Brits hated them for the way they treated Arthur when he was searching for the grail.

I used to work as a demo artist for a dealer of TDI Explore, a French 3D modeling and animation package. I was sent to New York to attend training on the new version. The training was done by the programmers - who smelled like homeless guys. Now I’m not entirely sure if that was because they were French or programmers.