I have huge reservations about the teaching of religion. Especially the indoctrination of children with bronze age superstitions. I go along with Dawkins that religious brainwashing is child abuse.
I'd prefer to have reservations, and strong ones. Having no reservations whatsoever and just blithely accepting whatever you're told (or whatever you're teaching) can lead to blind faith and dogmatic arrogance, neither of which does anybody any good.