I've worked in many very diverse places, and the American minorities as well as immigrants tend to be quite nice people. The ones yelling and being a-holes are almost invariably white, even when whites are like only 10% of the workforce at a place. Why is it like this? Is there a major problem with white culture? Is it the Protestant ethic?
By the way, this is not intended to inflame racial tension. This post merely broaches a serious issue that others who've worked in diverse places have probably noticed too. And also, I am white, mainly, though also part Asian. But I look white to most Americans, although Europeans can often detect Asian features in my face and can tell that I am mixed.