I’ll save everyone an hour.
Iran became a theocracy because the alternative was communism/socialism when Shah regime failed, and in 1970s in the middle of Cold War it would have been a huge humiliating defeat to have Iran turn commie. So the lesser “evil” was chosen to release Ayatollah from a French jail and have him lead the revolt to turn Iran into fundamentalist Shiite Theocracy as religious fundamentalists would never agree with atheist commies.
Yay or nay?
Mostly agree.
Would add that the shah was delusional in that he wanted to simultaneously westernize the country while at the same time remain an absolute monarch. Big oil reserves gave him a big ego, even more so when France and Britain begged him for loans (which he gave). He was also foolish for giving interviews in which he expressed his opinions freely (as though he was just another politician and not a head of state). The 2500th anniversary party also didn't help (air conditioned tents in the desert and food flown in from France while he has people struggling to feed themselves). Guy was so caught up in how great he was, he didn't even realize how bad of a situation he was in.
Tldr: he was an enlightened absolutist but so far removed from reality that he was never going to succeed.