7. The Biggest effect of the Crusades in the middle ages was the increased trade routes the East. The term "Crusades" is not used today because many Muslims are insulted that the war was for religion and feel as if the Christians were degrading them. | 7. The Biggest effect of the Crusades in the middle ages was the increased trade routes the East. The term "Crusades" is not used today because many Muslims are insulted that the war was for religion and feel as if the Christians were degrading them. |