This is a very interesting story:
http://www.lcsun-news.com/ci_8893673
In my opinion, the decision of that committee is wrong; a photographer more closely resembles an independent contractor than a public accommodation. A public accommodation usually refers to a business establishment open to and serving anyone in the public, like McDonald's. A photographer, on the other hand, may chose her jobs as she pleases; she's not involved in providing a "service" to the public. A wedding photographer, for example, may refuse to shoot an auto race. So I don't think that "public accommodation" determination will hold in court, but then, I don't know NM law.
As for her stated reason, that's much more questionable. Certainly most professionals, in any profession, would give a neutral reason for their refusal... a response which has grown out of cases like this.
Anyway, I think this story is interesting for photographers' rights.