Hi, I set up this account especially for you.
First of all, I am so sorry for the plight that you are in. Please don't leave your husband at this moment; if you do, I'm worried that he will turn into something more radical. However, if you have tried everything to talk sense into him but fail or if he becomes physically aggressive, that's another story.
Have you considered taking your husband to a psychologist? Or do you know some of his close friends/relatives who are not racist? Try to get your husband talk to them.
Or try to (discreetly) make him read real stories of the Holocaust - to let him understand what Nazism really means.
As a last resort, anti-depressants such as Prozac, Celexa, may drastically reduce his aggression/hatred towards "other races" or women.
You must stand your ground firmly and must never be swayed by your husband's attitudes/behaviours. If there's anyone who can change him, it's you. I understand how frustrating it is to battle against someone who holds drastically different (and wrong) values, especially if it's someone close to you. But please, please, please, don't give up on them without trying. I guess you don't need my reminder, but never forget that what you are standing for is 100% correct: women = men; white = Asian = black = Hispanics, etc.
Kudos. It will get better, and I hope to hear any updates from you later on.