If I see racism in my husband

And noticed it after we got married. Is it okay to divorce him? I have talked to him about it bothering me. He is blind to rhe fact that the things that he does say come across as racist and he denies the fact that he is. That is something that I do not stand by or tolerate. Also because I have mixed race nephews and nieces and I would never want them to hear racism talk. It is hurtful and not okay. I literally just cannot tolerate a human like that