Walaikum-Salam Br Arif,
Thanks for the reply. I am not disagreeing but please clarify little more.
[""It is very hard to believe that for centuries the Muslims were following just the corruption and there were no sincere Muslims existed during this long period of time who would have tried to restore the truth.""
Pls read following verses
12:106 The majority of those who believe in God, do not do so without committing idol worship (in different forms).
[Mushrik = One who calls upon gods besides God = Associates others with God = Believes in false deities = Ascribes partners to Him = Submits to false authorities = Prefers clergy over revelation = Commits idol worship in any form]
In past centuries a minority of those who are not Idol worshipper should always be existed.