You mean a defined dogma, right? There are doctrines less than defined dogma that are not opinions.
BoD is not one of those.
Raoul's quite right about the
status quaestionis here regarding BoD. I have problems very similar to nαzιanzen and Chrysostom regarding BoD. See the other thread where I quote them. You can see that the Fathers gave much more importance to the Baptismal character than BoD proponents do. It's much more than a badge of honor but is what grants human beings the faculties capable of sustaining the supernatural virtues.
And I have TREMENDOUS problems with the implicit BoD of the "noble savage". I do consider that Pelagianism.