The Constitution is only too clear on the issue of separation of Church and State. It says that:
"Article the third [Amendment I]
Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances."
The states in this country should not be in the business of legally recognizing any church activity for the benefit of some over others or for exercising their right to take part in any church activity. The last time I checked marriage was an activity of the church and not of the state. The states in this country should not be allowed to issue marriage licenses. If the states wish to recognize a persons legal standing then it should not be called marriage but a legal union and nothing more for any individual. This would do away with the issue over gay marriage because the states would not be put in the middle of a fight between different churches and the people in those churches and their beliefs of what marriage is or is not in a religious manner.
If a law was passed to prevent the recognition of some but not all marriages by different churches then it would be a violation of the first Amendment to the constitution because it would prevent those individuals from freely practicing their form of religion because marriage is an instruction of the church and therefore should not be an activity regulated by the states in this country.
Why no one has thought to file a lawsuit up to now to strike down or prevent the states right to issue marriage licenses is a wonder to me.
"Render unto Caesar the things which are Caesar’s, and unto God the things that are God’s"