"Jesus would rather kill, not marry, gay people" - Franklin Graham

[robvalue]

You have religious beliefs? Fine. You live by those beliefs? Fine. You place restrictions on yourself because of those beliefs? Fine. You expect people outside of your religion to be bound by the same restrictions? Fuck off. You don't adhere to the restrictions of other religions, now do you?

There is also the argument from extinction, which is a little more robust than appeals to definitions:

When a gay has children, they are always more gays. So eventually there will be nothing but gays. Then we will go extinct because gays can't have children. The only way to stop this is to keep gays unmarried, since only married gays can have children, except of course they can't, because they are a gay.