European Christians actually didn't *invade*. They came to defend Christian communities from the murderous barbarians.
Sounds like a historical rewrite to me. Do you have any sources?
Muslims brag about it:
"...the chronicles of the Byzantine historian Theophanes (d.758), to name a couple, make clear that Muslims conquered much of what is today called the "Muslim world."
"According to the Muslim historical tradition, the majority of non-Muslim peoples of the Old World, not desiring to submit to Islam or its laws (Sharia), fought back, though most were eventually defeated and subsumed.
"The first major conquest, renowned for its brutality, occurred in Arabia itself, immediately after Muhammad's death in 632. Many tribes which had only nominally accepted Islam's authority, upon Muhammad's death, figured they could break away; however, Muhammad's successor and first caliph, or successor, Abu Bakr, would have none of that, and proclaimed a jihad against these apostates, known in Arabic as the "Ridda Wars" (or Apostasy Wars). According to the aforementioned historians, tens of thousands of Arabs were put to the sword until their tribes re-submitted to Islam.
"The Ridda Wars ended around 634. To keep the Arab Muslims from quarreling, the next caliph, Omar, launched the Muslim conquests: Syria was conquered around 636, Egypt 641, Mesopotamia and the Persian Empire, 650. By the early 8th century, all of north Africa and Spain to the west, and the lands of central Asia and India to the east, were also brought under Islamic suzerainty.
"The colorful accounts contained in the Muslim tradition are typified by constant warfare, which normally goes as follows: Muslims go to a new region and offer the inhabitants three choices: 1) submit (i.e., convert) to Islam; 2) live as second-class citizens, or "dhimmis," paying special taxes and accepting several social debilitations; 3) fight to the death."
Centuries later, and partially due to trade, Islam came to be accepted by a few periphery peoples, mostly polytheists and animists, who followed no major religion (e.g., in Indonesia, Somalia), and who currently form the outer fringes of the Islamic world.
"... as U.S. textbooks equivocate about the Muslim conquests, in the schoolrooms of the Muslim world,
the conquests are not only taught as a matter of course, but are glorified: their rapidity and decisiveness are regularly portrayed as evidence that Allah was in fact on the side of the Muslims (and will be again, so long as Muslims uphold their communal duty of waging jihad)."
The Historical Reality of the Muslim Conquests