I agree with y'all about the 1950's US foreign policy
Based on hindsight, US policies in the Third World were
always pitched against the great majority of the population's needs and aspirations.
The cronies we backed guaranteed we'd get what we wanted out of there with minimal costs as long as they got their cut.
The reason is simple- fighting WWII against truly monstrous opponents, the USA didn't need to make their case very well to get cooperation from various resistance movements. They typically threw money and weapons around like candy.
Also, out of the Big Three, the US pulled dead last in HUMINT by a considerable margin, because their ELINT and code-cracking capabilities yielded such great results they felt the need for HUMINT unnecessary.
I'm not saying Wild Bill Donovan and Co. of OSS were incompetent, but they cribbed a lot of notes from the Brits' SOE example and exploited ground the Brits paid in blood and sweat to establish with various partisan movements in Continental Europe without crediting the authors or their contributions.
The OSS also didn't exploit the disaffected and idealistic nearly as effectively as the NKVD/OGPU/KGB did via the various Internationals 1920-1940, and later.
The, once anti-Communist hysteria hit during the Turman Administration, no less, folks like the Dixie Section (OSS, State Department et al who liaised with the CCP) were tarred with being Communist sympathizers for merely acknowledging the facts on the ground and thus purged anyone with any sense.
So let's review, how the heck was the US supposed to develop a rational anti-colonial policy when
(A) the biggest perps- the Brits and French were our gallant allies during WWII and politically untouchable until the Suez Crisis? That's eleven years of shenanigans (1945-1956) the Brits and French had US carte blanche that locals neither forgave nor forgot.
(B) Our intelligence apparatus and State Department acted more like a Chamber of Commerce than a useful intel-gathering and analysis group?;
(C) Anyone with sympathies for the vast majority of natives got branded a Commie symp-traitor and drummed out of service?
(D) Did I mention how low a priority human intelligence gathering from the hoi polloi (who probably had socialist leanings anyway) was for the military, CIA, and State Department? They wanted the folks in charge, jealous of their privileges and unwilling to share, who spoke our language or one we were willing to learn, such as French in Vietnam's case, to deliver us the commodities and profits we wanted as long as they got their cut.
To reverse these trends, requires a series of profound changes in American political expectations, priorities, and rhetoric that it would be unrecognizable from 1900 on.
You'd have to butterfly the whole banana republic/ gunboat diplomacy phase from McKinley on that endears us yanquis so to Latin Americans to this day where we develop the reflexes of supporting a coup whenever it looked like an honest vote would mean more expensive coffee, bananas or oil.