Do you think that Nazi Germany and the USSR were just "trying to maximize their own power and access to resources"?
When we compare morality, we compare morality among contemporaries.
And also those three proxies I mention above, none of them are about resources but regional dominance. What would the resource even be? Iran has its own oil. In fact what's going on in Yemen is basically a proxy war between Saudia Arabia and Iran.
https://news.ycombinator.com/item?id=12575423
and for example
Why does it have to be secular as a prerequisite? Saudia Arabia is not only not secular but its not democratic either.
It's not a stretch to say these agencies were acting as proxies for their home oil company's interests. So logically US and and British petroleum companies went to Iran and did bad shit.