I agree with your general point, but at the time U.S. was locked in an existential struggle with the Soviet Union and essentially was taking all sorts of actions around the world against many parties sympathetic to communist causes. Not saying it's an excuse, but it does provide some context
It's extremely tiresome to watch actions being justified because the "big bad" communists were out there. And what is this about an existential struggle?
The only real struggle between the two nations was who would dominate the rest of the world. I don't consider this existential. China is doing just fine without wanting to take over the rest of the world.
It's great revisionist history going on right now with Nelson Mandela's death. If you don't know the real history, you would think the States was right there beside Mandela fighting for freedom.