There was no "genocide" of the "old Yishuv" the very few isolated cases you brought up were in reference to only two cities in Palestine; Safed and Tiberias and in every case only a small amount of people were ever killed and in many cases the articles on this dealt either how the event had been greatly exaggerated by later Zionist hasbara propaganda or how many of the people (immigrant Jews from Europe) who had left soon returned to communities in Safed and Tiberias (such as when Daher el-Omar rebuild different damages cities after periods of fighting. But again what you would bring up were a few very isolated incidents in the two cities of Palestine; Safed and Tiberias, and the Jewish communities there were immmigrant communities from Europe allowed to live in Safed and Tiberias by either the Mamlukes or the Ottomans.