Twenty century US foreign policy was about supporting capitalism, not democracy. I assume you’re referring to the CIA lead coups in the 20th century that upended socialist countries. I would like to think we’ve learned from these mistakes in the 21st century.
As for drone strikes in Yemen in the 21st century, which is what I think you are referring to, killing civilians is obviously wrong. I think not fighting terrorist organizations would also be wrong. It’s in the interest of democracies to fight back against terrorists.
edit: Oh and I am ethnically Jewish, so I do have a lot of opinions about Palestine and Israel. Israel is an apartheid state, but I still believe in a two-state solution.