[BeAllYouCanBe]

"during the last Crusades."

The Crusades were basically a holding maneuver to stop Islamic expansion. So if you look at the Crusades as a black mark against Christianity you need to look a lot deeper and ask some questions:

1. Since the Christians had access for over a millennium to the Holy Land and the Muslim expansion denied access to Christians is that really a war of aggression? I call it defense.
2. If Islam is so peaceful why have they killed so may in wars?

[SEGUET]

"So if you look at the Crusades as a black mark against Christianity you need to look a lot deeper and ask some questions: ..."

As Christianity of that period was limited solely to the Catholic Church, though the Eastern Orthodox had started to rear its head -

The other Christian organizations were never even considered as the brunt of blame for agressive acts of the Vatican.