If I were another student's college and a parent contacted me with this stuff, I would be thinking, "Gees, can't this kid handle something this minor. Thank God that kid is not coming to my school, as I would have to deal with the parents and not the student. Nothing, but trouble."
OP's H is "furious" but OP is "not mad at all." I read the original post as the mother asking us to weigh in on how serious of a matter we all thought this was since she and her H did not agree.
Comments that can be construed as "bullying" or "racist" are a violation of most high school codes of conduct. If your D doesn't feel like the comment fell under either category or if her school has no such behavior code, then she might consider doing nothing. If she was upset and her school has a code of conduct that she feels was violated, I would support her decision to report it.
I think at the end of the day the student should make the decision though, not the parent. Often it is the parent that is enraged but "it rolls off the kids back."
There is no one in charge of making students nice. There is no one to direct this call to.
D has had heated conversation with him many times before but his ignorance is not bearable.
@GMTplus7 I think D already forgave him. She's very forgiving and I hope it's not a bad thing..
He wants to be a politician and that worries my daughter a lot.