Complex sentence: In 1945-46, the main issue in Iranian politics were the Soviet-sponsored separatist government in Iranian Azerbaijan and Kurdistan, which greatly alarmed the Shah, who repeatedly clashed with his prime minister Ahmad Qavam, whom he viewed as too pro-Soviet.
Split into simpler sentences: In 1945-46, the main issue in Iranian politics were the Soviet-sponsored separatist government in Iranian Azerbaijan and Kurdistan, which greatly alarmed the Shah. He repeatedly clashed with his prime minister Ahmad Qavam, whom he viewed as too pro-Soviet.