Does Growing Cultural Acceptance of Homosexuality Make it Moral?

Ellen DeGeneres is practicing lesbian behavior and she thinks it's OK. Does that give her any moral authority?

Theological/philosophical question for the day:

Is the rightness or wrongness of homosexual behavior dependent upon cultural acceptance of that behavior?

Modern application:

Does the fact that Ellen DeGeneres — a popular comedian, talk show host, and practicing lesbian — thinks homosexuality is OK make it OK?

Corollary question:

Do the condemnations by those who approve of homosexuality of those who do not (as “bigots,” “homophobes,” “haters,” etc.) have any moral authority?

Rephrased:

By what standard and authority is opposition to homosexual behavior deemed “immoral”?