Interracial marriage was illegal in much of the US until just 45 years ago. The Stonewall Riots were the same year we landed on the moon. Romer v. Evans wasn't until 1996, and Lawrence v. Texas is just eight years old. You have a poor sense of history and the passage of time if you do not recognize the staggering speed with which the world can and has changed.
> Seeing the change in your lifetime does not mean the entire process occurred in your lifetime.
When did slavery start in america, the 1600s?, and when was interracial marriage legalized, 45 years ago? That is the timeline of change for african americans. Just because you see the end of something in your lifetime, it does not mean the process also started in your lifetime.