I reread the article and pyne doesn't state any identification with any particular oriental culture and about what i know muslims and arabs do you mean by example that the arabs are consider ethnics and muslims are more religious group. I really don't know what else to put

Question

Arabs are loosely defined as anyone who speaks Arabic or is descended from an Arabic-speaking family. Most (but not all) Arabs follow the religion of Islam.

Muslims are the people who follow the religion of Islam. Arabs are an ethnic group.

http://www.mapsofworld.com/images/world-religion-map.gif