I just presented the facts as to where the fighting took place, within the Arab and International sectors. What reason there was for the capture of land within the Arab sector, including the siege and subsequent conquest of a large Arab city (Jaffa) started long before the partition plan was approved, can be a matter of contention. The fact is, it happened.
The only neutral information that can be found is that of British intelligence reports back to London which state clearly that the Jews were attacking and the Arabs continued to hope for a peaceful settlement.
"After an increase in violent attacks by the militant Zionists of the Stern group and Irgun, British officials reported later in 1946: "Arab leaders appear to be still disposed to defer active opposition..............
There is a real danger lest any further Jewish provocation may result in isolated acts of retaliation spreading inevitably to wider Arab-Jewish clashes.............they (Arabs) are fleeing from the mixed areas in their thousands. It is now obvious that the only hope of regaining their position lies in the regular armies of the Arab states.".
British officials predicted war – and Arab defeat – in Palestine in 1948
Not surprisingly, Monty has taken it upon himself to selectively edit the article he linked to. That's a pattern we see from him.
From the link:
"By early 1948 British officials were reporting that "the Arabs have suffered a series of overwhelming defeats." They added: "Jewish victories … have reduced Arab morale to zero and, following the cowardly example of their inept leaders, they are fleeing from the mixed areas in their thousands. It is now obvious that the only hope of regaining their position lies in the regular armies of the Arab states."
London was warned: "Arab-Jewish violence is now diffused over virtually all of Palestine". A few days later, British officials spoke of "internicine [sic] strife" and the "steady influx of Arab volunteers" from neighbouring countries.