A reader suggests the following quote from James Baldwin to explain some of the delusions and hatred:
"An identity is questioned only when it is menaced, as when the mighty begin to fall, or when the wretched begin to rise, or when the stranger enters the gates, never, thereafter, to be a stranger: the stranger's presence making you the stranger, less to the stranger than to yourself."
I think I correctly gauged the American public's willingness to elect a biracial president. I think I drastically under-rated their willingness to actually be governed by one.