<<A sequence of alphanumeric digits is now a "sectarian religious symbol"?
<<So, what sect does this sentence represent?>>
Well, plane would know better than I, but my guess is that the alfanumeric sequences each represent a chapter and verse from a book of the King James Bible, so the sect would be any Protestant denomination that uses that Bible. Some of the sequences are standardized codes like 1 Cor for 1st Corinthians, for the book, then the numbers separated by a colon represent, I think, chapter and verse respectively.
Of course, to a schlepper like me, even if I guessed the book, the chapter and verse numbers would be meaningless, but some of the quotes are so popular among the sects as to be instantly recognizable just from the chapter and verse numbers, and even if they're not, a soldier with a Bible can just look it up and, if it appeals to him, he probably won't forget what the numbers stand for, once he knows.