The Arab-Israeli war started on 15 May 1948, after the UN Partition of 29 November 1947, after the Nakba ethnic cleansing had begun and retrospectively we now know it was approximately half-way completed by Jewish insurgents, and after Israel had declared independence on 14 May 1948.
During the British Mandate in Palestine, there was Arab opposition to British policies which developed into the 1936–1939 Arab revolt in Palestine, while the Jewish opposition developed into the 1944–1947 Jewish insurgency in Palestine.
At the time of the UN partition vote on 29 November 1947 all the way through to 22 February 1948, there was zero “Arab” instigated attacks either by indigenous Palestinians or the neighbouring “Arab” countries towards the Jewish population.
The same cannot be said of Jewish insurgents though:
18 December 1947 Al-Khisas Massacre- 10 Arab villagers including 5 children
30 December 1947 Haifa Oil Refinery Massacre- Jewish group Irgun threw two bombs from a passing vehicle killing 6 Arab workers and wounding 42. The surviving Arab workers then went on to kill 39 Jewish workers suspecting them of being responsible.
31 December 1947 Balad Al-Shayk massacre- Irgun retaliation for Haifa Oil Refinery. The orders were to “kill maximum males”. Up to 70 Arab villagers.
4 January 1948 Jaffa Saraya Building- Lehi, another Jewish group, detonated a truck bomb killing 26 Arabs and wounding hundreds.
5 January 1948 Semiramis Hotel- Irgun planted a bomb killing 25 civilians (mixed ethnicities and nationalities) including a Spanish diplomat.
7 January 1948 Jaffa Gate attack- A Jewish truck driver detonated a large barrel bomb, killing at least 20 Arab civilians.
19 February 1948 Sa’asa Massacre- Jewish Palmach. At least 60 Arab villagers, including women and children were killed in their homes that were then demolished.
It is not until 22 February 1948 that the Arab High Command retaliated with the Ben Yehuda street bombing that killed around 50 Jewish civilians of all ages.
It wasn’t one-sided, but it was very unbalanced with the majority of massacres being done by Jewish militant groups on Arab civilians.