The United States has blocked attempts by its Middle East allies to fly heavy weapons directly to the Kurds fighting Isis jihadists in Iraq.
Some of America's closest allies say President Barack Obama and other Western leaders, including British Prime Minister David Cameron, are failing to show strategic leadership over the world's gravest security crisis for decades.
They now say they are willing to "go it alone" in supplying heavy weapons to the Kurds, even if means defying the Iraqi authorities and their US backers, who demand all weapons be channelled through Baghdad.
High-level officials from Gulf and other states say all attempts to persuade Obama of the need to arm the Kurds directly as part of more vigorous plans to take on Isis (Islamic State) have failed. The Senate voted down one attempt by supporters of the Kurdish cause last month.
"If the Americans and the West are not prepared to do anything serious about defeating Isis, then we will have to find new ways of dealing with the threat," said a senior Arab government official. "With Isis making ground all the time we simply cannot afford to wait for Washington to wake up to the enormity of the threat."