Indeed, Saudi Arabia does not have a chance against Iran alone. Saudi Arabia unfortunately I'm sad to say overly underestimated their strength when merely they haven't even fought a single modern wars, not even one except fighting some of militant in Yemen who accepted the truce but yet continued to remain active.
The sanctions in Iran is disappearing soon enough, allowing to revive Shah era wealthy Iran while enjoying the proxies against Saudi with no words from the international community whereas Saudi Arabia urge them to do actions against the mullah when they'll not and in fact are more concerned to Saudi Arabia than Iran because of their policies with approving religious figures to allow funding Al Qaeda which is a threat to national security and Iranian sponsored militias are not blacklisted terrorist organization nor been condemned by the West. For instance, Hezbollah is under the TO but has ties with France while Iran is the ally of Hassan hence no reaction from the international community when they fought in Syria with several foreign Shiite factions but concerned on Al Qaeda. Not to mention US is now sharing intel with Hezbollah to counter jihadi affiliated in Lebanon and assisting Iraq, the two countries giving assistance to Assad while the US blabbering claim to support the friend of Syria opposition.
To summary this, Shiites are generally less moderate than Suunis and thus no one cares. Once King Abdullah dies, there is a possibility of an armed conflict with Islamist v Pro Al Saud v Shiites in the Gulf since the Middle East is boiling with no stability once leader is removed. This gives the opportunity for Iran to arm the Shiites and annex the oil areas which is populated by Shiites and to Bahrain and Kuwait then UAE Islands and Yemen. We now understood why the Gulf is announcing compulsory military service.
