It's not really speculation because it doesn't really matter, just like her alleged faith. To assume that Lopez is a Roman Catholic (or even that the specific faith has survived that long) because of a chance reference is also speculation, and yet that has stayed. The reference to The Art of War is doing no harm, and isn't offensive in any way.
Personally, I would much prefer a reference to The Art of War on a public site than a religious reference. Personal preferences aside, I don't see how having the connection to The Art of War does any harm, so why not leave it?
Why would it be a stretch to associate Lopez with the segment of The Art of War? Lopez was the first thing I thought of upon hearing that passage.
Hi, I see you have undone my edit on the Bullpup page. I may suggest you look at the Halopedia's Layout Guide. In the end of the article, we need to have a section called "List of appearances".