Yes massacres happened, but this is not the “big picture” of Palestinian Jews in Palestine predating Israel.

Here’s another wiki page: https://en.wikipedia.org/wiki/Palestinian_Jews

In the narrative works of Arabs in Palestine in the late Ottoman period, as evidenced in the autobiographies and diaries of Khalil al-Sakakini and Wasif Jawhariyyeh, “native” Jews were often referred to and described as abnaa al-balad (sons of the country), ‘compatriots’, or Yahud awlad Arab (Jews, sons of Arabs).[4] When the First Palestinian Congress of February 1919 issued its anti-Zionist manifesto rejecting Zionist immigration, it extended a welcome to those Jews “among us who have been Arabicized, who have been living in our province since before the war; they are as we are, and their loyalties are our own.”[4]

Not to mention the PLO considers them Palestinians (and the funny fact that needed to reiterate this and remind people that it’s okay and normal to be both Jewish and Palestinian)