Europeans will smile, pat you on the back, accept your money, then cringe, curse & laugh at you once you're gone. 
They see Americans as the useful, aloof idiots because we kinda do what we want when we want. There is some truth to the "aloof, useful idiots" part, but in no way shape or form do they like us.
They hope for our downfall and love to see us struggle. It's schadenfreude.