——Oil is the least of it.-——
I would argue that oil is the most of it.
American sanctions against buying Iranian oil were waived for certain nations including Japan and China. Very recently those waivers were withdrawn.
China will disregard the sanctions but Japan will not. ‘There are a few others that will also accept the sanctions and comply with President Trump’s wishes.
He has enlisted the support of the GCC, especially the UAE and Saudi Arabia in increasing production to supply these previous Iranian customers.
The attack on ships in the UAE harbor is direct attack in retaliation for the sanctions. Both saudi and UAE vessels were targeted. A message was delivered.
Iran has now kinetically engaged enemies beyond just the USA. Both Saudi Arabia and the UAE possess dangerous air forces
Iran now faces danger from dangerous militaries in addition to the US Navy. All these forces are coordinated and can and will act as one if necessary
You are correct. The reason the message was delivered in Fujairah is because the emirate of Abu Dhabi built oil export pipelines to Fujairah as a hedge to Iranian interference in the UAE ports inside the Arabian Gulf. Fujairah is the only UAE emirate not on the Arabian Gulf.