What were the significant causes and results of the Crusades? According to the assigned sources, how did the Byzantines and Muslims view the west European crusaders?
I do not have any of the “assigned sources”, so I can only answer the 1st half of the question.
The primary cause of the Crusades was the request of Byzantine Emperor Alexios I asking Europe for help in fighting the Seljuk Turks. Historians are still debating the underlying reasons that drove the crusades, however.