I think the Sunni Arabs are giving tacit support to Israel against the Shi’ite Persians because of Arab fears of Persian hegemony.
When Israel takes out the Iranian nukes, they will be roundly condemned by Sunni Arabs (and the rest of the world). However, the Sunnis will also be smiling in relief.
Definitely. Shia in the Kingdom have declared independence. No shooting yet, but that’s because the Shia tend to be the armed forces in the country. By the end of the 1980s/early 1990s, Saudi Arabia had accumulated more weapons than there was reasonable expectation they could ever scrape up enough soldiers to even use. The country is such a bunch of bone-idle bums (P.J. O’Rourke’s phrase) that nearly a fifth of the population of the Kingdom is guest workers, who do the actual work of the society while all the bills get paid for the citizens by people in the United States and other countries which import petroleum.