Kuwait’s Emir urged the GCC’s disputing parties to resolve their differences this week. But with Qatar’s export revenues on the rise despite the ongoing embargo, the GCC rift shows no signs of healing in the near future.

The Saudi-led embargo against Qatar is nearly five months old and looks set to continue for the foreseeable future. Kuwait has sought to act as a mediator in the dispute but has little to show for its efforts so far. Nevertheless, Kuwaiti Emir Shaikh...