oh yeah , just some totally uncorroborated hearsay.. L Do you want more? https://www.middleeasteye.net/news/iran-executes-two-more-protesters-ongoing-crackdown https://www.middleeasteye.net/news/iran-protests-security-forces-intensify-deadly-crackdown-kurdish-region https://www.rudaw.net/english/middleeast/iran/11062025
Totally just second hand hearsay. do you still want more?
The Shah was couped with the help of leftist who got backstabbed by the islamists. They weren't the only possible opposition, they were just the most politically savvy opposition.