Morality is a spiritual concept, not a scientific concept.

Watch out for your lack of proportionality is hurling judgments about people not being able to agree and killing each other "because God."

The Encyclopedia of Wars lists all 1,763 documented wars in history up to the point of publication. 123 (6.87%) had a religious cause. 66 of those were Islamic/Muslim. Of the remaining 57 religious wars, 30ish wars were Catholic, mostly to regain Muslim-conquered lands. 27ish Protestant, mostly defensive against the Catholics. Zero (0) with any rational grounding in the words, will, and way of Jesus Christ.

The vast majority of wars in human history have been perpetrated by secularists for secularist reasons. And that obviously makes sense-- nearly all war is actually about resources... Which is the entire point of my article.