Of course changing diapers has salvific effects, although most of us don't have to use the term. We change diapers out of love and where there is love, there is God. Is this something new to you? 


Of course there is among us a shared faith. I'm not sure how many of us need to be reminded of that? 


And, I'm not sure why you think religious communities wouldn't want a member to help coal miners and their families, or why God wouldn't be asking those questions of all of us in the supernatural hereafter. Jesus said that's exactly what we would be asked.