Earlier quoted context omitted.
By which you mean we withdrew support from the Shah, not so much that we supported the Iranian Revolution itself.
The USA have backed the coup against the democratically elected prime minister Mossadegh, to begin with. "In 1953, the CIA- and MI6-backed 1953 Iranian coup d'état overthrew Iran’s democratically elected Prime Minister, Mohammad Mossadegh, who had nationalized the Anglo-Persian Oil Company." https://en.wikipedia.org/wiki/Iranian_Revolution
Like: yes, I lay a lot of the responsibility for the nightmare state Iranians live in at the hands of Cold War NATO policymakers, for sure, but I don't think it's all that useful as a positive claim of what happened in the 1970s. The US did not support the Ayatollahs.