Most of the villages in your map are marked as part of the Jewish state that was officially accepted by United Nations: https://en.m.wikipedia.org/wiki/United_Nations_Partition_Plan_for_Palestine

This was the only plan at the time the British mandate on Palestine was over.

According to the source above, the Arab leaders used arguments such as: "We will sweep them [the Jews] into the sea." or "We shall eradicate Zionism."

In this war there were massive massacres from both sides: https://en.m.wikipedia.org/wiki/Killings_and_massacres_during_the_1948_Palestine_war#List