Clearly you haven't read about very many wars then. I probably couldn't name one war from the medieval period where people thought God wasn't on their side afterall, yet none of them were spectacularly different from wars from earlier periods either in terms of bloodshed and slaughter.
In fact in the Civil War there were even some Union generals who felt God was on their side, not to mention certain segments of the populace!! OH MY THE BODIES SHOULD BE PILING UP NOW FROM THE RELIGIOUS SLAUGHTER

Your really stretching here to find any evidence Jackson is insane. You've been able to prove he's eccentric and suffered from some mental disorders probably, but nowhere have we seen that Jackson is out and out
insane. Frankly your grasping at straws to fit this theory, and based on all of Jackson's actions during the Civil War there is no evidence to support it. The man was a clever but eccentric commander who followed the rules of war and outside his correspondence cannot be seen to be practicing any sort of crazy religious fanaticism (which frankly borders on slander since it seems to have in no way effected his conduct) in support of his cause.