[af_vet_1981]

When Palestine became Islamic around the year 1200 we begin to see some foreign admixture.

Let's stop there and get the dates correct first.

The siege of Jerusalem (636–637) was part of the Muslim conquest of the Levant and the result of the military efforts of the Rashidun Caliphate against the Byzantine Empire in the year 636–637/38. It began when the Rashidun army, under the command of Abu Ubayda, besieged Jerusalem beginning in November 636. After six months, Patriarch Sophronius agreed to surrender, on condition that he submit only to the caliph. In 637 or 638, Caliph Umar (r. 634–644) traveled to Jerusalem in person to receive the submission of the city. The patriarch thus surrendered to him.

The Muslim conquest of the city solidified Arab control over Palestine, which would not again be threatened until the First Crusade in 1099.

[Cronos]

Arabs conquered much of the current “Arab world” in the 7th century but the majority remained Christian or Jewish until the 12th century.

Egypt was majority Christian until the 12th century