Compared to other StackExchange sites, Christianity.SE has a very high percentage of closed questions, as pointed out and discussed in this Meta post: Why does this site have such a high percentage of closed questions? This indicates a high level of misunderstanding about this site and its purpose among new users. One of the answers to that meta post, by a relatively new user, suggests that much of this misunderstanding is a result of this site being mis-branded.
As a modest step toward correcting that mis-branding, I would suggest that in our masthead, instead of having "Christianity" by itself, we add in smaller letters, perhaps above and offset from the main title, the word "about," so that it reads something like this:
This would be a tip-off to the actual nature of the site: that we are not a Christian site (see: Brothers, we are not Christians‼), nor are we a Christian discussion site, but a site whose purpose is to answer questions about Christianity.
In other words, such a change to our masthead would suggest to new users who may be looking for a place to discuss their Christian issues and Christian life that this is, instead, a site that serves as an objective observer of Christianity.
This change to our masthead would not, of course, be a miraculous cure-all for the common misunderstanding of our site and its purpose among new people who wander in here from Google searches. But it would provide a clearer indication of the nature of this site in its masthead.
(Note: I previously made this suggestion at the end of a Meta answer here.)
Edit: I have accepted curiousdannii's answer because I think his proposal for the masthead is much better than mine. As I said previously in a comment there, I would like it even better if the "about" I suggest were also added to the masthead, above "Christianity." However, if the consensus is that his proposal is best as-is, then I would willingly accept that as a great improvement over the current masthead.