It has something to do with their work ethic. We had a German exchange student living with us for a while. He brought his own bread and sausages. That was a little weird, but it just got weirder once I introduced him to my female friends. Guy started giving them weird gifts like carved wooden pipes and apple cinnamon jam. They were a little weirded out but chalked it down to him just being a quirky foreigner.
I tried to get the kid to play some baseball, too. He was doing pretty well, actually. Until he got a strike, then he started slamming the bat on the ground. I told him to stop, that's an expensive bat and he acted like I just killed his father, didn't wanna play anymore and ran off into the woods.
Weird people.