I'm pretty sure DMKA is either being facetious, or playing devil's advocate. Heh, quite a fitting use for the term devil's advocate...

Anyway, here's a thought: How, exactly, does legalised gay marriage undermine the sanctity of Christian marriage? As far as I can see, a Christian marriage should remain just as blessed and meaningful as it was before, in the eyes of Christians. Allowing homosexuals to have legally-recognised marriage is about as 'harmful' to the Christian marriage tradition as giving legal status to Jewish, Muslim, or Hindu weddings. And I'd just love to see a fundamentalist try to argue why the US should legislate to ban all non-Christian marriage...