I am getting very tired of my mother in laws prejudice attitude. My husband and I moved to where we…

I am getting very tired of my mother in laws prejudice attitude. My husband and I moved to where we did to let out kids get a diverse experience (that my husband and I did not get). Every time our daughter spends any length of time with my mother in law my daughter will pick up my mother in laws attitudes towards anyone who is not white. I keep telling her everyone is equal and even the school system is teaching the kids to love all people. I don't know what to do anymore with my mother in law. I can't ban her from my house but when we try and talk to her about her actions she gets defensive and denies them.