Maqsad Jamal, who are you trying to fool? Do you mean that you have not read The Quran before reading the book written by Arun Shourie (I have not written what he has written).
You are using Mullah logic. Mahabharata is an epic (story) and no sane hindu will tell you that it is an irrefutable revealation of some "all powerful almighty" to be followed by all till eternity.
Also some abusrd belifs of the hindus do not make them "gospel truths!
All religious fanatics (irrespective of religon) are in the same boat. So one accusing the other is just like pot calling the kettle black.