Not a lawyer.
But basically this is a legal way of telling someone stfu. Either because you can't snitch on the corporate secrets, or you can't whistleblow questionable behavior, if INC is to be considered as the context for this NDA.
You always bring a lawyer to these things to read the fine print and make sure terms are just (i.e. no one gets f*ked over).
Kind of hypocritical from a religious institution, since iirc 'salvation' never had paperwork like this. The only org i know that can behave in a way like this (or probably even worse) is S c 1 e n t 0 l 0 gy