It's brainwashing that's targeting young people, they're trying to normalize it in the minds of youth. They're not targeting older people like me (53), they know it won't work on us. The constant image of mixed marriages in the media has children growing up believing it's normal and desirable, just like the rampant homosexual and transgender characters in the media. It's working too, try making a comment about a mixed race couple to a teenager and they'll look at you like you've got a horn growing from your forehead. They've been conditioned to think that it's the normal state of affairs and they can't handle any challenge to their programming.
The media doesn't do anything that isn't ordered by their overlords so I'm not really sure what they want to achieve from reordering American society in this way. My guess is they basically want to breed the Caucasian race out of existence. Liberty and personal freedom are unique to western civilization so if you remove caucasians from the world what you have left are people without a history of free thinking who will be easily controlled.
Pretty sure that's the plan, and it has about 75-80% chance of success, in my opinion.