Well, at least he didn't defend anything disgusting and immoral like consensual sex between adults.
Exactly, this is the point that I never understand with homophobes (and I am not misunderstanding your joke), what is wrong with consensual sex between adults?
How can love between adults be wrong in it self. Who's buisness is it what partners, of what sex aduts fall in love with and choose to spend their lifes with?
And it is also as Lucy Duke puts it "Well, what would you accept as proof?".
What proof does a homophobe accept, when they can't realy define what is wrong with homosexuality?
The basis of homophobia seems to be an unease with the unknown and what has been popularily stigmatized in society, usualy followed by ad hoc constructs to rationalise this unease/dislike like the claim that "it is a choise".
THe only realy good way of realising that homophobia is bad is socialising with homosexuals, and getting to know them as fellow human beings, which is problematic because of the homophobe then fears of being suspected of being a homosexual himself.
My best advice is to listen to the Howard Stern Show when George Takei visits for a week at a time. The Show is built around honesty, and George is honesty personified, and the nicest humanbeing imaginable. Former homophobes (even truckdrivers and other manly men) have phoned in during the show and told that in fact it was George Takei's visits to the Stern show that has cured them of their homophobia.
So there is hope.