specifics
From this very thread, here:
The society, humanity and the future development of all concerned are taken into account. If homosexuality would lead to extinction for all then it is to be avoided and is a destructive act. Homosexuality and gays are therefore engaging in destructive acts to society.
Gay marriage is equivalent to interspecies relations. It will lead to extinction of the species.
Deviancy has historically therefore been made a "sin". Sex with the same gender, sex with animals all falls under the same "moral" flaw - failure to reproduce.
Legalizing and endorsing gay marriage is akin to legalizing termination of humanity.
Homosexuality will ALWAYS be wrong - it will NEVER be right.
He characterizes homosexuals as a threat to humanity. Not even "homosexual acts", as in the "love the sinner, hate the sin" line followed by certain Christian sects, but homosexuals themselves. This is a condemnation of a whole class of people based not on what any of them have done, but on who they are. This is a hallmark of bigotry.
He carefully comes up short from saying so -- which indicates he is aware of the consequences of his statements -- but what do we do with threats to humanity? Do we leave them alone? Do we let them live in our neighborhoods? Do we invite them to our parties and hire them to work in our businesses? No. How do we justify the exclusion and isolation? Because they are threats to humanity.
His additional "evidence", the fractured syllogism, is laughable:
A: Homosexual acts don't produce children.
B: Bestiality doesn't produce children.
Therefore, C: Homosexual acts are equivalent to bestiality, or to quote The Master (above), "Gay marriage is equivalent to interspecies relations."
Followed by another dire prediction of the doom of humanity.
Fearmongering.
C'mon, Frank. You don't have to like gay marriage to recognize that this is waaaay over the top.