[quote=mdk]
When the church and state were the same entity there was never a wars......
[/quote]

[url=http://en.wikipedia.org/wiki/Religious_war]Au contraire[/url]. They were very common, from civil wars to international conflicts.

EDIT

Specifically: The Catholic Church would say "fuck these guys" and the rest of Europe typically went along with it. Them and rogue knights/mercs and so forth. Same goes for retaliatory jihads. Also Japan. The entire history of Japan is riddled with examples of the religious government ordering exterminations, wars, and so on.