As a comparative, take into the accounts of history. Number of people in the comparative populations to the numbers killed. Start from the "beginning". Mesopotamia (?) Sumerians, Assyrians, Hittites, Egyptians, Phoenicians, "Sea Peoples, Persians, Greeks, Romans, Alexander the GREAT (???) --you see the drift????-yeah... go eastward the Chinese, Mongolians, the Japanese. A little to the south, the old East Indian texts.
Biblical.
Get back to Western Europe. Include the Crusades. You seeing what I am telling you?
Islam.
The slaughter is consistent.
There is a better way.