Churches should decline to act as agents of the state. Do the church service only after a couple being married has completed the legal formality of obtaining and completing their marriage certificate and being married in front of a judge. I hate to suggest this because it plays into the “’Wall of separation” view of church and state, but do we really want the Gay lobby to fund its activities with the proceeds of lawsuits against churches and Christians?
The church in Denmark is officially part of the State.
Exactly. Churches could agree to only marry those who are believers of that faith, That way, if homosexuals want to marry in the church, they'll have to go to some Episcopal or Methodist church, or some other church that will marry them.
They could do so even without the couple having a marriage license. That way, some older couples could marry in their church without their pensions or Social Security being affected, because they're not 'legally' married.