You'd be surprised. There are alot of White nationalists/supremacists who are extremely opposed to interracial relations, in which they refer to as "miscegenation".
Alot of these supremacist white men hold white women to be the "purest" women and basically a reservoir for their heritage and believe that having relations with a Non-White male, especially a Black man, is one of the dirtiest crimes.
These people are everywhere in your neighborhoods, sitting across from you at the mall, serving you at restaurants, etc.
Just because laws have changed in the U.S. doesn't mean people's minds, hearts, and ideologies have. And the media gives the impression that race relations are improving, but truthfully, people like this will never go away.
And then we have people of color like whippedcreamdrear that find interracial relations to be a betrayal of their race. Why can't people just be happy