As a proud recipient of a bachelor’s degree in English *cough*, there are certain grammar opinions that I hold to strongly. I’m an Oxford comma partisan.1 I think the rule against ending a sentence with a preposition should be done away with.2
And I believe that evangelical should be lowercase.
I deal with this surprisingly often. When I was preparing my book proposal and writing the sample chapters,3 I went back and forth with friends and readers about whether I should capitalize evangelical. I changed it a couple of times, but ended up firmly in the lowercase camp.
Why? Well, it’s a combination of reasons: both serious and trivial.