Gay marriage and conformism

This article by spiked editor Brendan O'Neill is a gold mine of quotes on conformism, and a thoughtful picture of the current gay marriage discussion from a secular liberal perspective.
Here's one of the best:

The fragility of society’s attachment to traditional marriage itself, to the virtue of commitment, has also been key to the formulation of the gay-marriage consensus. Indeed, it is the rubble upon which the gay-marriage edifice is built.

That's a good observation and helps us understand why Christians (and others who think gay marriage is a bad idea) shouldn't shrug their shoulders and assume that a diminished view of heterosexual marriage changes nothing, affects only a few, and won't bring about further unexpected consequences.