Why is South Africa upset about Iran joining BRICS naval drills?

South Africa hosted BRICS naval drills in January 2026, including Iran, which has sparked controversy and drawn criticism from the US. The BRICS group, consisting of Brazil, Russia, India, China, South Africa, Egypt, Ethiopia, Indonesia, Iran, and the United Arab Emirates, conducted the exercises in South African waters from January 9-16. The drills, named Will for Peace 2026, were intended to promote maritime safety and interoperability among the participating nations. However, the US government has condemned the exercises, particularly Iran's involvement, amid existing tensions with several BRICS members. South Africa has launched an inquiry into Iran’s participation, apparently against the orders of President Cyril Ramaphosa.