Was it "racially insensitive" to say to gay people — as Ann Coulter did — "Marriage is not a civil right. You're not black"?

That's what Talking Points Memo says. I'm trying to understand the theory by which it's racially insensitive. The only thing close, in my view, and I know it's not TPM's, is that the remark contains the unwitting assumption that gay people are white. TMP notes Coulter's explanation:

It was part of a larger argument on which she later elaborated, telling the crowd that the 14th Amendment only applies to African-Americans and that it does not, in fact, apply to women, LGBT people or other minorities.

Can I get a quote? I don't trust this paraphrasing. She said the 14th Amendment only applies to black people? Or did she say that the 14th Amendment should be understood with some reference to its historical context of insuring rights for the freed slaves? It's not the same thing, TPM.