Byzantine army loses at Yarmouk, Arabs (Islamic army) takes over the region, Jerusalem and Palestine is now part of Islamic Empire, Caliph Omar stipulates the rights and obligations of all non-Muslims in Palestine. Jews are allowed to return back.

So my understanding of the situation is, the majority of the population is Jewish, then Orthodox Christians and Pagans, and now Muslims.

Questions is why is/was the majority of the population Muslim, even before Crusades majority of the population was Muslim. WHY?

Did people convert to Islam, as they incorporated Arabic and Arabic culture. What happened to the majority Jewish/Christian population. The current genetic research suggests that Arabs(Palestinians) and Jews are genetically related.

"Archaeological and genetic data support that both

Jews and Palestinians came from the ancient Canaanites,

who extensively mixed with Egyptians, Mesopotamian and

Anatolian peoples in ancient times. Thus, Palestinian-

Jewish rivalry is based in cultural and religious, but not in

genetic, differences."

http://www.rense.com/general48/Palestinians.pdf

I can't find anything solid. Can somebody please explain what changes took place, and what happened to Jewish and Christian populations, did they willingly accept Arabic and Arabic culture? Did the willingly convert to Islam. If not what happened?

Please provide resources/evidence!

Thanks!