The jew thing is the only one that's a blatant negative stereotype. The Jews have had to deal with ages of persecution and suffering in the past because of people generalizing them as money-hungry. The black people jumping is a stereotype, technically a bit racist, but not all that harmful. The Mexican one, well, I don't see how saying somebody 'looks like a Mexican' is racist at all. I think that's just our learned sensitivity to the word 'Mexican'. I mean, 'Looks like a Spanish person' doesn't have nearly the same offensive tone about it, does it?