It's my understanding that only one time, in 1973, did Arabs attack Israel first. It's certainly clear in 1948 who launched the first assaults:
Thats bull...
.January 1948 Arab Salvation Army (also called Arab Liberation Army - ALA) are admitted to Palestine by the British, supposedly following a promise not to attack Jewish settlements. Their leader, Fawzi Al-Kaukji may have entered Palestine only in March. Jewish Agency concludes arms deal with Czechoslovakia, but most arms do not arrive until June 1948, after the British have left. The UN, including the US, had placed an arms embargo on Palestine. This did not apply to Arab countries including Transjordan. As independent states, they were allowed to acquire arms. The Jordan Legion received a steady supply of arms from Britain through the Suez Canal, at least until May 1948, including a large number of 25 pounder cannon at the beginning of 1948. Hagana agents purchased 20 Auster light aircraft in Britain, sold for scrap, rebuilt them and brought them to Palestine for use of the Haganah. Haganah later rebuilt Spitfires left by the mandate for scrap as well, but did not have real fighter and bomber aircraft until May 1948 when Czech Messersccmidtts (or Avia imitations) and B-17s purchased clandestinely were brought into the country.
Timeline (Chronology) of Israel War of Independence - 1948 Arab-Israeli War