I will defend a restaurant's right to put a sign in its window that says "No Indians Allowed" (I happen to be Indian). I and my friends will take our business elsewhere. I agree with Dr. Paul that the market will naturally eliminate these attitudes.
I oppose any Federal involvement in marriage gay or straight. Why should I be discriminated against for being single? But if you're homophobic, rest assured the market will make you irrelevant soon enough.
No-one but Paul!