Dr Anwar Gargash’s comments come after a split within the Arab Gulf countries once again erupted over Qatar’s relationship with Islamist groups in the region and pressure on Doha to fall in line on confronting and containing Tehran.
“Warding off the discord will require a change in behaviour … and a regain in credibility,” Dr Gargash tweeted, in a clear reference to Qatar.
Saudi Arabia and the UAE were outraged after Qatar’s state media published comments from the emir Sheikh Tamim bin Hamad Al Thani critical of US and GCC policy towards Iran.
Qatar said the remarks, published late on Tuesday, were fake and that the state news agency that ran them had been hacked.
Newly re-elected president Hassan Rouhani spoke with Qatar’s emir on Friday and the Iranian supreme leader Ayatollah Ali Khamenei marked the advent of Ramadan by launching a rhetorical attack on Saudi Arabia, saying that the kingdom was being “milked” by Donald Trump.
The virulent comments come after the US president and King Salman agreed to arms deals worth up to $110 billion (Dh403bn) at a summit on May 20 in Riyadh. The kingdom also pledged to invest $20 billion in upgrading and building new US infrastructure, a signature domestic goal for Mr Trump.
In another sign of deteriorating relations with Qatar, descendants of the founding father of Wahhabi Islam sought to distance themselves from Qatar’s ruling family.
Some 200 descendants of Ibn Abd Al Wahhab demanded the renaming of a Qatari mosque named after the 18th-century cleric, Saudi Arabia’s Okaz newspaper reported.
Qatar’s state mosque is known as the Sheikh Mohammed ibn Abd Al Wahhab mosque.
“We, therefore, demand that the name of the mosque be changed for it does not carry its true Salafi path,” the statement said.
In 2014, Riyadh and Abu Dhabi withdrew their ambassadors from Doha over Qatar’s support for Islamist groups, but the diplomatic spat ended – or became dormant – less than a year later with the ascension of King Salman.
GCC countries will also be watching warily. Kuwait’s foreign minister met with Sheikh Tamim over the weekend to try to defuse the situation through dialogue.