Khomeini used leftists’ help to overthrow the Shah and get in power and then got rid of them. They are supporting the regime that backstabbed them. What’s even funnier is that Iranian leftists sometimes praise the Islamic Republic for being “anti imperialist”. Like the Islamic Republic didn’t help Asad remain in power in Syria, or use Hezbollah to meddle in Lebanon. The Islamic Republic fights against western imperialism because it wants to create its own empire.