On the topic of religion being taught in Schools, you only have to look at the Islamic religious schools to see that it can sometimes go too far.
Now, I don't suggest that teaching Christianity in schools would over go so far, nor that Christianity is anywhere near as dangerous in it's teachings as Islam can be, but if you object to one religion being taught, then you must on principle object to all religions being taught in schools.
That said, I have no objection to students being taught about religion (as opposed to being taught religion).
On the topic of the birth of mankind, I see no harm in informing students of other peoples beliefs (as opposed to evolution that is), though science as always, should remain the focus.
However, as far as religion being taught in schools to increase the moral fortitude of the population, that is just another form of tyranny - you can't dictate peoples beliefs to them, nor is it right to attempt to instill in children beliefs counter to what the parents teach at home. Parents can bring children up fine without the need for religion and for relgions to say otherwise is deceitful, which of course, is against most relgions
PS. I respect religions, and know many fine people who bear religious beliefs, but I also recognise some 'religious' people are overly convinced of the superiorness of their moral righteousness (as compared to non religious peoples)