Crusading activity simply became a part of European culture, the idea of making war on the enemies of the Church became part of European thinking. In a sense, the religious wars of the Protestant Reformation are the logical result of this mentality; by the time Europeans had exhausted themselves in internal religious war, we hear no more about wars against the infidel.
If we can assign specific results anywhere, it must be to the First Crusade. By creating formal states in the Holy Land, the First Crusade created a tie between Europe and the Near East. It was from this crusade that the consequences listed in the first paragraph above resulted, and that is why this crusade has received the attention of this narrative.