What factor enabled the spread of islam

The Islamic religion had no cultural traits that were appealing to global regions outside Southwest Asia.

Islam is everywhere and people are different everywhere so it has to be something that appeals to all of them in some way or another so that it can reach so many people. (Early Bedouin Muslims actually didn't really like the idea of non-Arabs converting to Islam. One of the reasons it was so popular within the peninsula was the ethnic factor: it was an Arab faith.)