Try not to get too upset about it. People Stereotype others all of the time. I'm sure that they didn't mean to offend anyone, just trying to make a point. Sometimes I get PO'd for the opposite reasons when people assume things about the US too. Like everyplace is dangerous just because that is all you see on the news, not saying that you were referring to it. Most of it is perfectly safe with very kind hearted people as I'm sure most countries are.

Peace!