I trained in a conservative religious area and many people would ask us about BabyWise. Although we all hated it (and I've actually READ the whole book..it's not as bad as it COULD be, depending on how you interpret it), we never said to anyone that we hated it or that it could kill your baby.
We would say, "you know, BW has some valid points about not putting your child before yourself or your marriage. That's not a healthy way to live your life. But it's been proven that for AT LEAST the first four months, babies need what they need when they need it. And grown-ups can put off their needs. When people are unwilling to meet their baby's needs when they need to, it is really damaging to the baby and it's selfish."
We'd also explain that nursing isn't designed to be on a schedule and that women who really follow the schedule strictly (when even the BW book doesn't suggest!) are universally setting themselves up for nursing problems.
And we'd finish with something like "you know, it's a great idea when you're expecting your first baby to look at all of the philosophies for parenting out there and to think about what how you're going to meet your baby's needs, but it's really impossible to know how you'll do it until the baby's HERE." And we'd suggest The Baby Book and some other more tame books to help them explore.
There are two differences, though: no one who came to us was already totally sold on it. They all wanted to know what we thought of it. And we were their "health care provider" for the pregnancy, so as midwives, we had more influence than most parents allow CBEs or doulas to have, unfortunately ;duck:
Charlotte, midwife to some awesome women, wife to Jason, and no longer a mama to all boys S ('01), A ('03) S ('08) and L ('10).