Homosexuality is also celebrated and encouraged, in fact, the white protagonists only son is maliciously forced into a homosexual relationship which eventually facilitates his demise.
White flight is also a theme that appears towards the end of the novel. Only this time it's more extreme than anything we've ever conceptualized or experienced. It really makes the reader consider what we're going to do when there's no other place to relocate.
The overall narrative is a haunting experience you'll remember for years to come. A world without white people is a place where high time preference, environmental decay and the putrid smell of belligerent brown people killing each other en masse is the way of the world.
They need us more than we need them.