That's because the Arab royal families of the Khaleej, Wahhabis/Salafis, ISIS, and even America itself are entities that directly serve the Zionist agenda. Your local Somali Salafi imam is part of a network that leads back to Tel Aviv whether he realizes this or not. Shias, like Assad and Iran, are being targeted because they, along with Russia, stand in defiance to this Jewish plot for world domination.
They clandestinely fund all sides, just like during the Iran/Iraq war, nothing has changed in relation to Iran since those days, there banks and institutions are still somewhat independent, but Israel still sent them plenty of weapons despite Saddam at that time being a patron to the American's.
Arab royal families with the exception of Qatar somewhat are 100% patrons, your right on that, but don't be fooled with this rhetoric that Iran is any different, a pious slave or a rebellious slave, at the end of the day is still a slave due to dependence to the global system.
Iran has serious demographics issues, the 'Persian's' are no longer majority there like they had been, there only rallying call is this shia crescent dream, it will ensure none of the many ethnics in their country rebels because they are kept busy with expansionist dreams and the many conflicts they ignite far from their borders
These people are far more dangerous then the royal toothless inbreds that are only concerned counting their wealth and spreading extreme ideologies
In their entire history, they have never fought zionist, all the fighting they ever did was against other Muslims, as they do today, don't be fooled by their cheap propaganda that they are a wall against zionist, it's BS.