Lets be frank to the end, main obstacle way i see it is position towards israel palestinian war, if that would be possible to align all other matters would be technical ones.
That is pivotal point of iranian policy and they suffered and sacrificied a lot to maintain it. Arabs should be more honest about it and even if they do not want to lead the effort at least they should not disturb others who wants.
So, i repeat if that would be solved behind curtains lot of other things would fit in amd region could move forward in more clear and productive directions then it was used to be.
Mate, no offense, but you have been swallowing the Iranian propaganda machine for the past 43 years it seems. The idea of Israel being the main goal,
the same country and entity that Iran has yet to fire a single shot at for the past 43 years, is laughable and even offensive for the Arab victims of Iran's policy in the region. That would amount to saying that Saddam's war against Iran was some kind of hidden agenda to weaken Israel (Iran was formerly Israel's strongest ally in the region under the Shah).
I am going to be brutal with you here, both Arabs and Iranians are imperial people with an imperial past. They both consider themselves as the dominant force in the region (by almost every objective metric and numbers Arabs are that in the real world but old habits die hard).
Since 1979, the Iranian Mullah's replaced Iranian state ideology (secular Iranian nationalism which naturally was inward looking) was replaced with pan-Islamic slogans and capitalizing on the Palestinian/Arab-Israeli conflict. It coincided with the political climate where Arab nationalism/socialism was being replaced with pan-Islamism - something the Afghan-Soviet war propelled in particular.
This ideology seeks to create loyal Iranian satellite states in the Arab world where Shia communities in particular live as obviously Sunni Arabs don't look at Iran as a political/religious leader. Since Shias in the Arab world (worldwide too) are a small minority and were often marginalized, they looked at/look at Iran, as some kind of savior out there to protect them.
At the end of the day it is all about influence, money, political influence etc. We can sugarcoat it by using Shia Islam, Sunni Islam, Russian sphere, "Western democracy" or whatever but at the end of the day it is the same thing, a fight for influence.
Anyway why should Arabs be "honest" about anything in this regard. I am not sure what you are referring.
Let us find out once and for all whether the Palestinian-Israeli conflict is about religion or nationalism? If it is the first thing, which I assume that you agree with, why should Arabs as a collective, be grateful for something that is supposedly the obligation of every Muslim?
Did the same Arabs, more than anyone else, not help Muslim causes in the entire world (for good and bad like every kind of external help in hindsight) more than anyone else objectively speaking? I don't think that anyone can object to that by hard numbers.
If you deem it to be a nationalist conflict about land between two related peoples, why the outside meddling?
And let us be honest here, Arabs and Iranians are totally irrelevant when it comes to Israel's political actions as long as Israel is under the protection of the USA and collective West. Even China, the broker of this deal in question, have cordial ties with Israel as do all powers.
Arabs and Iranians are mere spectators in this regard (Israel) whether we like to admit it or not. Similarly for the entire Muslim world.
Similar to other regions of the world where Muslims are struggling, I won't mention regions here or anything, people know them already.