One other thing:
Of the major conflict through human history, the establishment of the Islamic empire (and constituent kingdoms) does not even rate on the body-count list.
Every high body-count conflict is either Chinese or Western (Europe, Russia, US) in its origin or its execution.
The only deviation from this is a single warlord named Timur who was Muslim and killed a lot of folks.
That was 700 years after the death of Muhammed.
