I happen to be friends with a Libertarian from the US, rural fellow, but heir to a lot of money from his family, and is genuinely a party member who's voted for them multiple times. The way it goes with him is the two of us argue over capitalism constantly, and theres no way I can convince him of many Marxist ideas, but the difference between him and any normal libs, which I've noticed, is that unlike a lib, who would only become skeptical of US crimes overseas if it's the "wrong team", he immediately is opposed regardless of who says it, and his opinions on US involvement in foreign countries lines up 100% with mine, despite arriving at those conclusions from very different ideological backgrounds.

I have more hope for this type of person than I do with any liberal, who will only ever have the right opinion on war, genocide, and apartheid decades after it's long over and too late.