Exclusive dependence on Persian and Arabic sources, for an account of Muslim invasions, is apt to produce an unbalanced view. The basic prejudices of the Muslim historians, who mostly belonged to the Ulema class, against other religions, make them reject any other account, however authentic, if it tends to subvert their basic belief in the might of Islam. The victories of the arms of Islam have been elaborately described while the reverses have either been conveniently omitted or painted as having ended in negotiations and tribute. Even when described, only minor details are made available.
Ram Gopal