The ooda (Observe, Orient, Decide, Act) loop is completely screwed in this conflict, no side is acting rationally and trying to figure out relationships is extremely complex. A couple of weeks ago Saudia Arabia was bombing UAE assets over a dispute about Yemen. 7 Years ago certain countries blockaded Qatar:
"The blockade, which effectively made the GCC a dormant institution, created a zero-sum dispute that has become highly emotional. The Saudi and Emirati-imposed blockade has failed to pressure Doha into making the concessions demanded, leaving Riyadh and Abu Dhabi in a difficult position with the limits of their power on full display. Contrary to the interests of the quartet, the siege of Doha has only pushed Qatar closer to Iran with implications for the Middle East’s fluid and complicated geopolitical order.
Like Turkey, China, and Pakistan, it is undeniable that Iran has played a key role in helping Qatar maintain its independence over the past two years. Qatar has been using Iran’s airspace and shipping routes to circumvent the blockade. Between 2016 and 2017, Iranian exports to Qatar increased by 181 percent. Iranian-Qatari trade in non-oil commodities has doubled just since March. Morally and diplomatically too, the leadership in Tehran was quick to come to Qatar’s side, strongly denouncing the ATQ’s blockade of Doha from the start of the crisis."
https://www.atlanticcouncil.org/blogs/iransource/gcc-dispute-pushes-iran-and-qatar-closer-but-with-caveats/
The other funny thing about the GCC Countries is that they are big sponsors of terrorism (Qatar - The Muslim Brotherhood, Saudi Arabia - Salafist groups like Al Qaeda and ISIS etc etc).