Perhaps you could try to stick to the subject at hand, humanimal, instead of side rants about evolution.
Fragmentsofdreams touched on the point I was originally trying to get at with his example of prohibition. While it is not illegal to drink, some seem to feel that it is immoral. While adultery is not illegal, some seem to feel that it is immoral. While homosexuality is not illegal, some seem to feel that it is immoral. The same goes for marrying your cousin, watching inappropriate contentography, etc. None of these are illegal, but many seem to feel that they are immoral.
How do you justify, as a secular state, the enforcement of the morals of a particular religion? If the state makes these illegal, are they not promoting one religion over another?