Here's the timeline Athena did not include:
In Mecca, Muhammad the crackpot merchant is visited by an angel - he discovered that is a prophet and messenger of Allah. At first he is accepted as the village loon, but he grows annoying with his hell fire preaching and demands of the Pagans to change their ways.
622 AD, the crackpot figures out that his safety is in jeopardy and moves from Mecca to Medina. He and his followers are welcomed by the local Pagan and Jewish tribes there.
From his new base in Medina, Muhammad is short on cash. He sends his peace-loving followers out to plunder the merchant caravans of the Pagan Arabs. In response, the Pagans began guarding their caravans with armed soldiers.
624 AD, the Muslims attacked and defeated a heavily guarded merchant caravan and took many of the pagans captive, this incident is known as the Battle of Badr and was the first major battle in the Muslim conquest of Arabia.
624-628 AD, Muhammad wages war from Medina against Pagan and Jewish Arab tribes, expanding his budding mini-empire. Muhammad's power and influence grew, so Muhammad decided to expel his hosts, the first two tribes from Medina (the Banu Qaynuqa in 624 AD and the Banu Nadir in 625 AD) and then he massacred the final tribe (the Banu Qurayza in 627 AD).
630 AD, Muhammad conquers his home town of Mecca and over the next two years he sends his armies all over Western Arabia to crush the remaining Pagan tribes, as well as Jewish and Christian towns.
632 AD, Allah is pleased, so Muhammad dies. After his death, a series of Caliphs (Islamic leaders), the closest of Muhammad's companions continue warring and aggressive territorial expansion. Abu Bakr, one of Muhammad's father in laws suppresses a rebellion in Arabia that had been started by various Arab tribes that had renounced their conversion to Islam after the death of Muhammad, known as the Wars of Apostasy.
Abu-Bakr begins the invasion of other lands, that of the Byzantine Christian Empire of the Mediterranean, and the Sassanid Empire of Persia. Both of these empires were in a weak state having been in almost continuous war with each other for an entire century and were unable to mount much effective resistance.
634 AD - Abu Bakr dies. Umar, who spent 17 years at Muhammad's side takes charge. During the Caliphate of Umar, Muslim armies conquered almost the entire Middle East, including the Levant, Egypt, and much of Persia, the rest of Persia was conquered under the reigns of the two subsequent Rashidun Caliphs (Uttman & Ali).(see map 4 - 661 AD)
661 AD - The Rashidun Caliphate comes to an end in a civil war, and a new dynasty emerges from this civil war known as the Umayyad Caliphate.
The Umayyad Caliphate, the Muslim armies reaches the Maghreb, what Arabs call Northwest Africa, they were met with stiff resistance. At this time, control of Northwest Africa was divided amongst the Byzantines, who controlled the coastal area around the city of Carthage, and the native Berber peoples, who controlled the interior and the coastal area of Morocco.
The City of Carthage falls to the Muslims, who then move on to wage war against the Berbers. Berber resistance to the Muslim conquest focused around a Berber Queen named Kahina, she led the Berbers in a number of successful battles against the Muslims.
Then the Byzantine Emperor Leontius sent his navy to recapture Carthage from the Muslims in a stunning surprise attack. The Muslims were forced to retreat to Kairouan and regroup, in 698 AD they besieged Carthage for a second time and captured the city.
As punishment for the city's stiff resistance to Islam, the Muslims destroyed Carthage for the second time in it's history, just as the Romans had done in 146 BC. With Carthage finally destroyed, the Muslims were able to turn their attention back to the Berber resistance, in 702 AD, the Muslims defeated Kahina once and for all at the Battle of Tabarka. (See map 6 - 710 AD)
Then, around 720 the Islamic Caliphate, the Muslim Arabs cross the Straits of Gibraltar and invade Europe. Visigothic Spain was easily overrun in just a few years, but the Arabs were stopped by the Franks at the battle of Tours (France) in 733 AD. Thus most of Europe was saved from Muslim rule and would remain Christian.
In 300 years much of the western world Christianity spread by peaceful conversion. But in 100 years, Islam, in holy wars (and one civil war) conquered all of Arabia and then conquered as far west as Spain and as far east as Afghanistan. The Islamic Caliphate became the largest empire the world had yet known. Of the 5 Christian Patriarchates (the 5 great urban centers of Christianity in the 6th-7th centuries AD), 3 of them were under Islamic rule (Jerusalem, Alexandria, and Antioch), with only Rome and Constantinople remaining Christian.
"Without this history" of wars lauched against Christians, Jews, and Pagens...would Athena's question have any relevancy?