I have a different take on the issue. It's because I think the issue of belief is so important that I don't think we should indoctrinate our kids to believe in a particular belief system... and this applies especially for parents with strong religious convictions.
If a parent is very devout themselves, then they probably place great value on their freedom to believe and practice according to the dictates of their conscience without coercion. If they try to force their children to follow the same religion, then they deny this freedom to their children.
... and the more the parent considers their beliefs important, the more hypocritical it is for him to do this.
This. So very much this.