The tiny nation of Qatar packs a punch well in excess of its size. It is a mighty energy exporter with the world's third-largest natural gas reserves, a global financial powerhouse and, increasingly, a locus of political influence in the Islamic world. It remains, however, small — a population of just 2.6 million people — and isolated: It is bounded on three sides by the Persian Gulf and its only land border is with Saudi Arabia. In other words, Qatar is rich, ambitious and vulnerable — a dangerous combination.

It is discovering just how dangerous that combination is in the wake of the June 5 decision by Saudi Arabia, Bahrain, the United Arab Emirates and Egypt to cut relations with Qatar, expel its diplomats and nationals, and close ports, airspace and borders to the country.

The move reflects growing displeasure those governments have with Qatar. Two particulars top the list of complaints: a reported $1 billion ransom paid to al-Qaida linked terrorist groups for members of the Qatari royal family kidnapped in Iraq while hunting, and a recent speech supposedly given by the Qatari emir that praised Iran but which was dismissed as a hack of the Qatari state news agency website where it was reported. In fact, though, the Gulf states' grievances are more fundamental. They complain that Qatar supports dialogue with Shiite Iran — anathema to Sunni nations like Saudi Arabia — and backs groups like the Muslim Brotherhood and Hamas, which are accused of spreading terrorism throughout the region.