I disagree. A large segment of anti-GM folks, take this position for religious reasons. Marriage has been seen as a religious union for a long time... and though there is debate on whether it was formed via religion or not, it's ties to religion are pretty clear. Oh... and I would imagine that atheists do NOT get married in a church... so this would not affect them at all. I see nothing that is silly, pointless or detrimental... please explain how you would perceive it that way.
Does it matter where they get married? A marriage is a marriage, whether it is made so in a church or in a barnyard. Marriage is only considered a "religious union" because religions, like the government, have over time come to
recognize something that already exists in a different plane - that of tradition/culture. I repeat, the non-religious have the same marital union that everyone else has. And as a non-religious person, I definitely don't want to be left out of having the same type of marriage most other people have, just as I don't want gay people to be left out of this.
There's lots of reasons why it would be silly, pointless, and probably detrimental. First of all, if marriage exists without government recognition, then technically gays can
already get married... they just don't get the same
recognition for it. The reason they don't just get married without it being recognized is that this would be
absolutely pointless - the whole reason they're fighting is to get the same rights as everyone else, those rights only existing because of the recognition of marriage. The point is that if the government had a "separate" "civil union" that wasn't marriage, it would be all that would actually matter - and not actually calling it marriage would probably have some ill effects as people become uncertain of what exactly marriage
is. It reeks of opportunities to sort of cheat the system and get a "union" purely for the benefits it reaps, for one thing. You'd also have a lot of confusion about which type of "union" really mattered, family-wise... which would not bode well for those with one, but not the other.
Granted, that's assuming that it would be any different from what exists now, which I don't see how it would be. Again, it's
already possible to have a "religious" marriage without government recognition... it would just be completely pointless to do so, so nobody does it.