=== Frederick M. Schweitzer and Marvin Perry === 
 Bless sin's version basically includes the "complex story" bit. Plus it adds "were much better off under Islam than Christendom". Here are my thought: 
 * The complex story bit can be mentioned in the body of the article instead as Gerber for example points that out. So, I suggest we omit it from definition section.  
 * Saying that "Muslim polemics, persecutions and massacres" were less implies life under Islam was better. Of course it was not only "polemics, persecutions and massacres" but also restrictions on professions for example. But I think we can omit these extra points.