You’re right. Before communism we did it to get cheap bananas. And after communism we did it because we created a bunch of terrorists that we now had to fight.
No it doesn't. you need to have the context that Venezuela nationalized their oil industry during the Obama years. Was sanctioned, and the sanctions were redoubled under trump.
Nationalizing industries isn't necessarily communism, but it is the issue the US oligopoly has with Communism.