Completely unpersuasive - especially his third point, which boils down to, "the people who wrote it hate teh gay".
Also, being that I'm someone who can read the plain language of the constitution, as opposed to being a lawyer, I am opposed in principle to the establishment of any sort of "protected classes" of people. Creation of "protected classes" is a violation of the Equal Protection clause.
Being a "protected class" also tends to drop either the employment or salary of said "class".
It's much "safer" to hire a middle age white male, who is less able to sue you for discrimination.
(possible correction for middle age white heterosexual male)