I just heard that line for the first time the other day, but, good Lord, does it pithily explain so much resentment and misunderstanding.
It explains, in part, the rage of so many white (and, yes, racist) Trump supporters who see centuries of white privilege being eroded by a growing non-white population and a culture less overwhelmingly (though still very overwhelmingly dominated, in many very important ways) by the white population.
It also explains why so many white folks feel that ‘reverse racism’ is a problem (because, it’s really not; not even remotely).
Wish I’d thought of this phrase myself.