If anti-gay marriage people are ok with civil unions why don't we just call all civil ceremonies unions, including hetero, and leave marriage to the churches?

My choice is to have everything called marriage, but it seems that people have trouble separating the civil marriage from the religious one. I blame this on the fact that our clergy in America can perform the civil ceremony while doing the religious one. In other countries it is completely separate. My in-laws have two wedding dates a week apart.

So, it will be interesting to see how straight anti-gay marriage people feel about this proposal, hope we get some answers from them.