SalB,
You misunderstand. My question to you is; what is it that is causing it to be morally wrong? You said, "Moral law can be derived from common sense." In philosophy what you mean is that you think that through human logic you can look at nature and find morals. I don't know what else you could be saying because you either use logic and a religious source or you use logic and nature. Whatever it is, logic is never the source.

That was pretty close to what Rousseau believed. He believed that the savage man was superior to the sophisticated man. He believed that nature was perfect and that man was basically good, so man should be able to look at the world and use his logic to make morals.

Now, if you really believe that, you are what you call you call a secular humanist.
There is a clear contradiction between this theory and the Bible. The Bible says that the heart (includes logic) of man is evil and nature is perverted and there is a way through an unnatural means we can be perfected.