I understand how Iron Mike feel. Most parents want their kids to date and marry ppl that look like them. That is how ppl are socially constructed.
But, one interesting point IMT made regarding his son..
Said that his son didn't want to date girls who acted like his sister.
Found that to be interesting..
His sister is probably exhibiting masculine behavior & is turned off by it. Unfortunately, the color aspect comes into play.
So, maybe the son will gravitate toward Blk girls more if he is around those who are a lil more on the demure and feminine side of the game.
So, IMT, in a way you did answer your own question..
If endogamy was that important to you, then you should have done a better job with putting your kids in environments that would allow them to intermingle with Blk kids on their level.
Otherwise, welcome to possibly becoming a grandfather to blended families down the line. *shrugs*