I recall many years ago, the first case I heard of a white family adopting a black child. Blacks were demanding the adoption not take place, as it would rob the child of his blackness.
This is a well established practice. Many social workers will refuse white couples from adopting minority children for that very reason. This is partially why adopting children from the third world became a thing, and also why so many black children stay stuck in foster care.
Sure, just look at Colin Kaepernick, adopted by a white couple, or Obama, who was brought up by his white grandparents. If it wasn't for their looks you would think they were natural-born crackers. /s
For some reason I have never seen a black family with a white adopted child...