Yes, Manny, it would kill white people to "be nice" to black people even for a moment. First of all, being "nice" would then stand in contrast to their general state of "not being nice," and one would have to ask, "why the change?" and "why now?" Second, "being nice" at least once might entail having to be nice repeatedly, and white egos cannot take that. It would mean acknowledging us as people, and, I'm sorry to say, that's beyond the capabilities of too many white people. The existential dread can not be quantified. I'm not joking.