Original sentence: Basing on a collection of documents, Robert Spencer argues against Islamic tolerance  claimed by supporters of Islam today.The Myth of Islamic Tolerance: How Islamic Law Treats Non-Muslims is a controversial book by popular counter-terrorism author Robert Spencer
Edited sentence: In this collection of documents Robert Spencer provides a detailled debunking of the myths of Islamic tolerance propagated by Islamist propagandists today.The Myth of Islamic Tolerance How Islamic Law Treats Non-Muslims is a book by popular counter-terrorism author Robert Spencer