I think it's all relative. Historically God used genocide and what the uneducated call "war crimes" as a tool to advance His righteous will on Earth. Take the Amalekites.
- And the LORD said unto Moses, Write this for a memorial in a book, and rehearse it in the ears of Joshua: for I will utterly put out the remembrance of Amalek from under heaven. Exodus 17:14
The genocide against the Amalekites was Godly and, apparently, successful. I haven't seen any Amalekites running convenience stores in my neighborhood.
The point is, Jeb is right: as our wisdom in Christ grows, we may understand that something like murdering baby Midianites or machine-gunning Armenian women and children is really a righteous act taken in accordance with God's will.
It isn't historical revisionism, it's the result of increased understanding of God's will. Oh yes indeed!
~~OEJ