Your husband definitely has every right to be outraged by your parents' treatment of him and outraged by the racist comments. If you're asking advice on how to deal with your parents, I would flat out tell them that their behavior is entirely unacceptable, that they treat him as "less than", and that their racist comments AND how they treat him is not acceptable in ANY way shape or form. They owe him more than apologies. They owe him a complete 180 degree turnaround in their attitude. It's disgusting how he's been treated. I would want nothing to do with them either.