So putting ketchup on fries makes us "deplorable", or deserving of ridicule? That's just too funny to even be offensive.
That's not what I meant and I don't think that's what Kate meant. I was speaking of the loud, generally elderly tourists from Florida and New York City who travel to Europe and complain about the food, the lack of American "comforts" and expect everyone to speak English while themselves never making an effort to speak the local language. These people are impolite and demanding.
Certainly these folks make up only a small number of American tourists, but their behaviour is so rude that the rest of us get painted with the same brush.