My husband and I lived in Saudi Arabia five years and it was most interesting.
Officially the two countries don't do business but one day I was in our local ARAMCO market. One of the guys there, a Palestinian, was unloading vegetables. The box had a big ole blue Star of David. The Palestinian didn't know or care what it was--he was just doing his job. They really are abysmally uneducated and uncaring.
So, my conclusion was the that Israel did do business with the Saudis, but on, at least, a farmer-market level. Most interesting! I'm not surprised since most groups, whoever they are, are pragmatic about life.
I worked in a grocery in Bat Ayin, one of those evil “settlements” and we had all sorts of products from Saudi Arabia. Palestinians work for Jews, stock grocery shelves with Israeli products, and the only ones who give a damn are their so-called leaders, the PA, who tried to make it against the law to do either, and ended up with a near-revolt on their hands. It’s all bull-s@#$. Rock-throwing incidents in Jerusalem are often staged for the cameras. The professional class among Palis are horrified at the prospect of a divided Jerusalem. Those on the “west bank” who can are moving to Jordan to avoid having to live under whatever monster the PA would become as a state.