alt Hacker NewsIt ebbs and flows depending on whether it's an al Khalifa or an al Thani who controls Doha. Before the 1995 coup, it was the al Khalifa and al Ghufran clan that was in control, and they had both familial and economic relations in KSA and Abu Dhabi.
Khaleeji (like everyone else) are fine putting family history aside if it does not interfere with monetary incentives, and the crux of the issue has been clashing LNG claims between Qatar and Abu Dhabi. The al Thani clan has been pursuing a maximalist claim and works closely with Turkiye and Iran as their short term security guarantor as a result, but the al Khalifa and al Ghufran clan were fine with the Abu Dhabi claim because they have significant economic holdings in the UAE and KSA.
Now I know 100% you're talking out of your ass. The Al Khalifas rule Bahrain. The Al Thanis rule Qatar. That bloodless coup you were talking about? That was the father of the current Qatari emir deposing his father when he was abroad (https://en.wikipedia.org/wiki/1995_Qatari_coup_d%27%C3%A9tat).
The current emir succeeded him peacefully after the father stepped down.
All Arab families are intermarried in various ways, but the Al Nahyans have always been historical rivals to the Al Thanis, and have always tried to invade Qatar. The Qataris were invited to join with the UAE, along with Bahrain, but refused because they figured Abu Dhabi would take the leading role eventually (which it has). In all of the UAE, only Dubai remains more autonomous than usual because they were able to develop on their own with the guidance of the current sheikh of Dubai.