Most all things are partly religiously motivated. But is it enough to lay all the blame on the institution of the Catholic Church? I mean one athesit does something evil, that doesn't mean all athesits are evil, or atheism in general. The Crusades were in part a Just War, in my opinion. Much of what happened in the Crusades were very evil, done by Catholics, some of whom were truly believeing Catholics, who were misled.
The Crusades were a response to a violent Islam that had taken over Christian lands and massacred many Christians, both in the process of conquest, but also the molestation and murder of Christian pilgrims to the Holy Land. Christendom responded by attempting to take back the Holy Lands. So the Crusades were largely about defense. With that said, Christians did a lot of evil within the Crusades, but that happens in every war, its most unfortunate, and probably not worth it. That is why the Church ended the Crusades a long time ago. They realized taht the damage being done outweighed the goal.
The Crusades were a response to a violent Islam that had taken over Christian lands and massacred many Christians, both in the process of conquest, but also the molestation and murder of Christian pilgrims to the Holy Land. Christendom responded by attempting to take back the Holy Lands. So the Crusades were largely about defense. With that said, Christians did a lot of evil within the Crusades, but that happens in every war, its most unfortunate, and probably not worth it. That is why the Church ended the Crusades a long time ago. They realized taht the damage being done outweighed the goal.