A peripeteia occurs when the audience expects one thing but something else happens. It is a sudden turn of events or unexpected reversal,especially in a literary work. I hope this answer helps. Looking forward to help you again. Have a great day!
A possible reason was the attacks on them by crusaders and mongols around the 11th and 12th centuries. Another reason could have been the Arab rulers removing taxes from non Muslims and doing other things that hurt there income.
