Ok, I'll bite: How exactly do the KSA, UAE and Qatar "help us" deter Iran?
Pre-invasion Iraq certainly helped deter Iran, but it was the alliance with the US that was leveraged by those other three to deter not just Iran, but each other as well. The KSA could go a long way to solving some of their own internal revenue shortfall problems by rolling up a rich little neighbor or two (mostly formed by the Brits to ensure their share of the oil coming out of the AP following their eviction from Iran).
Israel and the Gulf States work hard to keep the U.S. thinking of Iran as "the enemy." Iran is not the enemy, Iran is both the past and the future of that region. Sure the Brits and the U.S. are both bitter because Iran dared to stand up and tell us both in turn to 'F-off,' but that fact alone validates the importance of Iran. What other state in the Middle East could expel both the UK and the US? That's that kind of moxie real Americans respect.
Someday we will either let the tail wag the dog, and get us into a fight with Iran; or we will swallow our pride and re-establish relations with this important nation over their protests. I hope it is the latter.
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