Nearly all of Iran's neighbors in the region except Jordan and Syria supported our withdrawal from the agreement. The only complaining was done by Iran, European nations and the UN.
Bahrain, Saudi Arabia, Yemen, the UAE, Egypt, etc all supported us.
I really don't understand why you think this makes this a good idea. Saudi Arabia also decided to launch an extremely ill-fated and brutal invasion of Yemen, which worked out terribly for them and for the Yeminis. I don't think they have good judgement on this.
The Middle East is not strongly in the sphere of influence that Europeans have yes.
I promise you that the boots on the ground of the rest of the nations listed by the other person here is far more important here than strongly worded letters by the aging bureaucracy that governs the EU.
all those countries are effectively US vassals. Most of them have US military bases on their soil. Of course they’re going to do exactly what the US wants
Bahrain, Saudi Arabia, Yemen, the UAE, Egypt, etc all supported us.