I allow concealed carry @ NLC. I even carry myself at the church at times. I don't carry in the pulpit though. I trust others who carry. We have Law Enforcement officials in most services...at least the 2nd service anyway.
I don't think it is a lack of faith. We are currently working with local law enforcement on a security plan. What to do, what not to do, how, when, why to "lock down" etc. We want to be prepared. There are no guarantees, but we are working within our rights and legal and moral parameters.
I have stated this before here, the LAST thing I would want to do is to take a life by use of deadly force. I would not want to live with that. However, I would rather deal with that having saved a life than have done nothing to preserve it. That is MY opinion and others have theirs and may be differing from mine.
I carry mine on the outside. It is in a holster which looks like a Daytimer pouch which is on my belt. I carry a Keltec 9mm.