I'm confused. Yes, D-Day was a good thing. Yes, D-Day was violence in service of democracy.
What does this have to do with whether (1) the Crusades were a good thing, or (2) whether religion (particularly Catholicism) was a substantial cause of the Crusades?
The crusades are often portrayed as violent Christians invading Muslim lands, which forgets that the Muslims violently took those lands from Christians in the first place.
On the other hand, no one complains that the battle of Normandy consisted of violent democracies attacking the lands of the Third Reich.
Here's the new thread for posting quotes, with the usual rules: