You're kidding, right?
From the earliest days of polytheistic civilization in the Middle East up to Caesar's conquest of Gaul, vicious massacres were the order of the day, mitigated occasionally by the practice of slavery.
And as I said they did it either in self defense or for material gain, not because they couldn't mind their own businesses and leave other peoples thoughts alone.
So9
What a stunted view you have. I hardly think that pre-monotheistic civilizations only fought for "resources" nor that monotheistic wars were fought only for ideological reasons. Try a little grey in your black and white world.
The Reformation and the Hundred Years' War, to take an example, was not just about how salvation was attained. It was about who would run temporal matters and who would get tithes.
SD