The whole pro-gay marriage issue is such a simple argument to win.  It goes like this:

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Random bigot:  I wish those goddamn queers would shut up about not being allowed to marry each other.

Rational straight person:  I don't understand it either, but then again I'm straight, so it just isn't my thing.  Hey, do you like anchovies on your pizza?

Random bigot:  God no.  Anchovies are disgusting.

Rational straight person:  I don't either!  Hey - will you sign a petition with me to outlaw anchovies on pizza?

Random bigot:  Uhhh, no.  That's a stupid idea.  Why the hell would I care what some idiot puts on their pizza?

Rational straight person:  Then why would you care if two guys get married?

Random bigot:  Because that's disgusting.

Rational straight person:  Disgusting like anchovies on a pizza?

Random bigot:  Don’t gimme that crap.  That’s totally different.

Rational straight person:  I don’t get it.  Neither of these things impacts you personally, you just think they are both gross.  So why is one not legal while the other one is?

Random bigot:  The Bible says it’s wrong – that’s why.

Rational straight person:  That’s true.  Hey - will you sign a petition with me to outlaw divorce?

Random bigot:  Uhhh, no.  That's a stupid idea.  Why the hell would I care whether people get divorced? I’ve been divorced twice myself.

Rational straight person:   The Bible says it’s wrong – that’s why.

That should take care of it.