The first issue that you need to deal with in this debate is who gets to decide what is right and what is wrong. If a majority gets to decide then you get tyranny of the majority on all minorities. If a small group of leaders get to decide then you get tyranny of the oligarchy. If one man gets to decide then you get the tyranny of a dictator. If everyone gets to decide for themselves then you get the tyranny of anarchy. If God decides what is right and what is wrong then and only then can we have absolute, objective, invariant and immaterial laws such as moral laws that all men must obey. Of course you could admit, as some philosophers have admitted, that if God does not exist, there really are no absolute moral laws that exist.
As Cecil B. DeMille put it:
If man will not be ruled by God, he will certainly be ruled by tyrants--and there is no tyranny more imperious or more devastating than man's own selfishness, without the law.
The point being is that if God does not exist, we should just admit that everything is permissible, we may not personally like the “moral” choices that other people make, but who are we to condemn another person. This would reduce moral choices to the same category as a person’s personal choice between flavors of ice-cream.
Now someone is going to chime in, but we have a rational definition of right and wrong, the utilitarian standard of doing whatever brings the greatest happiness to the greatest number of people. To which the next logical question is, what instrument are we going to use to measure happiness and who gets to decide when the happiness of the majority outweigh the unhappiness of the minority? So here we are again, back to the tyranny of the majority.
Whatever argument you can bring up for morality without God, it will always result in a form of tyranny. With God in the equation, tyranny is condemned and can be lawfully resisted. This is how our founders determined that they were right in resisting the tyranny of King George. Without God in the equation then it is survival of the fittest and you may resist but if your not stronger than your opponent then it looks like your opponent is right.
So as all this pertains to the question of gay adoption, if God doesn’t exist then we should we let cannibals, murderers, rapists… adopt children and we should let no moral judgments whatsoever cross our minds for after all cannibalism, murder and rape has given the human species an evolutionary advantage to this point, so it should also give us an evolutionary advantage in the future.
If God does exist, then we had better listen to what he has to say in his word and obey lest we provoke Him to come and judge us by sending tyrants to rule over us and cause us to suffer his wrath not only in this life but also in the life to come.
As this pertains to Ron Paul’s position on this subject, he is absolutely correct, the federal government has no business dictating to the states how they should punish criminals and therefore on the federal level, our representatives should not even bring the question up because it falls outside of their jurisdiction.