Rajesh Khanna?Is Ibn Ishaq part of Quran? It is part of Hadith? Why you quote the books written several centuries after the death of Prophet Muhammed as if they are given the status of divinity in Muslim theology? The only coincidence with you and other Muslim critics is your profound knowldge of Islam which is to treat every arabic bearing book as if it Quran or Hadith This forgery incident is very well refuted in many grounds.There are hundreds of websites which will elobrate this.
Prophet Muhammed while being the head of state even accepted the invitation of hospitality from a oridinary Jewish woman (who poisoned the food ,but that is a different issue). Prophet Muhammed was abused ,persecuted,expelled just like many other prophets. Read some books on how books are actually compiled during the early days