battle of manzikert

Say in a world where Manzikert is never fought nor any other major battles between the Byzantines and Seljuks that result in the loss of Roman Anatolia. Instead, the Seljuks go after their original target, the Fatimids of Egypt. So how does the Turkic empire fare against the Shia Caliphate...

Would there still be crusades? After all, the crusades started after the Byzantine emperor asked for help. The situation in Syria/Palestine would develop differently if the Byzantines had won at Manzikert. Of course, the answer depends on what would happen after Manzikert. Would the Byzantine...