No they were all Jews with ties to the land of Judea through DNA links. The arab armies were doing what they always do and exercising their ethnic cleansing to keep the non muslims as downtrodden as possible. Just as many Jews that lived in the M.E. migrated to Israel as did from Europe, and then after 1948 many more Jews from the M.E were evicted from their homes and made their way to Israel. The arabs reneged on the treaties they had signed giving the land of Palestine to the Jews after the grand mufti incited rebellion and hostilities across Palestine.
Are you being serious? "Ties to the land of Judea through DNA links"

If DNA links meant that people could just settle land their ancestors had lived on 2000 years prior, Greeks could reclaim Byzantium or Native Americans could claim land in China. Sheesh, what a concept.
No Arab signed over Palestine to the Jews, and, no Palestinian agreed to give up his home and land to European settlers, it was taken from them. That is just propaganda.
Could that be because the arabs had no land in Palestine to begin with, the demographics show that very little land was owned by arabs. Don't forget the Palestinians are trying to claim land they never held title to or even lived on as they arrived after the Jewish farms started production.
Yes what a concept that a simple blood test could determine a person claims to be indigenous and able to trace their ownership of the land back to roman times as false. Or that the same blood test could show another person has direct links to the land due to a faulty Gene present in 99% of the people who lived their from before Christ till the present day, yet is present in less than 1% of the Palestinian muslims.
The owners of the land could dispose of it how they saw fit and did not need the itinerant muslim workers permission to do so, this would be like saying you cant dispose of your land because a traveller wants to live there free of charge.
You really need to get your head out of the Koran and start reading modern history books that tell the truth.