I bet this turns out to be nothing more than a lone nutter, with no religious undertones at all. Depressed at work or home, nothing to live for, blaze of glory.
Very easy to believe that no-one knew until the final minute as it was such a gradual descent, and probably above cloud level. It wasn't until they got below that right at the end that they realised just how close the mountains were.
Sod. That.