It's actively performing military action in South America, not just flirting with it. Flirting would be rhetoric, positioning ships and aircraft. We're using aircraft to kill alleged drug runners, but with no evidence provided that they even were drug runners (not that I think that would be sufficient justification, but it's better than "because I said so").

Every American administration in recent memory has engaged in military action.

He doesn't have plans to seize the entirety of South America. He just wants to depose a dictator and it's not even clear he will actually do it. He's just putting pressure on it to happen.