Social engineering. For a long time, the advertising industry, and more recently the entertainment sector in general, have been pushing this shit into the subconscious of the sheep.
Virtually every hetero couple in adverts is mixed race, always a black man with a white woman, and now entertainment shows are following suit.
Also, it's still acceptable to portray black men as masculine. They're all swaggering about with broad shoulders and biceps ahoy, as the white women swoon. Any white bloke in an advert is a scrawny wimp, wearing a tight cardigan, with a silly beard and thick glasses. They are also required to smile politely and keep their mouths shut as their woman wets her nickers over the black man also featured.
another thing I've noticed. Any domestic situation portrayed, shows the woman in charge, and dealing with the important stuff while her male partner wafts around with feather dusters and hoovers.
If the Caucasian race doesn't think it's being systematically phased out. Then it's fucking blind to the obvious.