LGBTs aren't minorities. They are people engaged in some [but not the whole gamut] of deviant sex lifestyles. It's a crucial distinction that will come more to the fore as legal arguments progress.
You cannot arbitrarily grant some behaviors repugnant to/subject to local regulations special federal protection while shutting the door on others. Who decides which minority voice is "more better" than others? Surely not the majority anymore, right?
Goodbye democracy. And this is the damage being done to society right now by "gay marriage"...and the attrition happening to democratic rule by SCOTUS refusing to honor its words in Windsor and grant stays to protect "states' choice" in the interim while this question of "just some behaviors getting special protection" appeals its way to a final hearing.
To equate sexual behavior with minority races is a monumental insult to minorities. It cheapens their very existence.
No one is equating sexual behavior with minority races. For instance- if you have an affair with your neighbors wife, that is not the same as gays being fired from the State Department for being attracted to men, or being arrested in a bar because the bar is known for serving homosexuals.
When I discuss minorities, I speak of minorities that have faced historic discrimination and/or persecution- Jews faced discrimination- legal and otherwise, as did Catholics. Chinese were denied citizenship and the right to own property. African Americans were systemically discriminated against by Jim Crow laws and a host of similar laws. American Indians weren't even considered fully American citizens until the 1920's or 1930's, and had their children removed from them and taken to Indian schools where they were forbidden to speak their native language.
And homosexuals were discriminated against in a variety of ways- NY City and others systematically targeted homosexuals for arrest and shaming. Gays would be arrested, and rather than prosecuting, their pictures were put in the newspapers and employers called in order to get them fired. The State department fired anyone suspected of being gay. And of course being known as gay would mean discharge from the armed forces.
All examples of discrimination by the majority against a 'despised' minority. Was the treatment as 'bad' for each minority? Hardly.
But in all cases the treatment was discrimination based upon the majority believing that the minority was 'less than' the majority- and not deserving of the same rights as the majority.