That all depends on your interpretation of the Constitution. A religion is someing for the worship of a particular Diety. No matter what, there must be worship. Do Gays worship the Gay God?
Also, this whole train of thought thing isn't in the Constitution.
Since even you say that Marraige is a religious institution, Then the Constituion SHOULD protect churches. The government should have no power in granting marraige licenses. No Judges, or Sea Captains, or county clerks with a pen. This should leave it in the hands of churches- as it used to be.
You all wave separation of church and state around, yet you forget this also means that the state does not and can not control the church.
That is why our government should only have the power of civil unions.
As always- None of my statements are evaluated by the FDA.
My advice is not intended to diagnose, treat, cure or prevent any diseases unless prescribed by a health practitioner. All information is provided for educational purposes only and should not replace the advice of your medical doctor.
(but your medical doctor will probably end up killing you