No one here is debating that there is some hidden upside to theocracy. They’re bad, we get it.
His point though, is that much like the Miami Cubans, the Iranian exiles that fled after the overthrow of the Shah, tend to be part of the old ruling class that had been disempowered. At least, the most vocal ones.
Also, just like Batista, Mohammad Reza Pahlavi, was enabled and backed by Western powers, before revolutionaries overthrew him and ended his dynasty.