That's not what a crusade is in SA. A crusade is when a realm or group of realms is declared an enemy of the church or alternatively preserving a realm is declared a mission of the church. It wasn't the church that made those wars lopsided, it was the Northern Astroist Federation.
You sort of have a point there, but weren't those Astroist realms all theocracies, or the majority of them. They fought wars only against realms with non-believers pretty much. If that's the case, we're discussing semantics here and nothing more.