For the most part, religious moral codes are quite rational, too. Seven of the ten commandments make good sense to everyone, even atheists. "Turning the other cheek" may not appeal to everyone, but there's a lot of sense in it - using something other than combat for conflict resolution would seem to be a good way to preserve the species. It seems to make better long-term sense than "an eye for an eye."

But yes, there are problems in religious moral codes. Since people tend to obey religious codes without thinking out their own moral decisions, there is a tendency for the understanding of religious moral codes to drift toward absurdity.

When you do things only because you were told to do them, you can end up doing some pretty stupid things.

-Joe-