I think there is something to this, but the US didn’t just “prop up” Suharto in the sense of had normal relations of trade and mutual favours even though he did bad things. (That indeed may well be the right attitude to many bad governments, and ones that many lefitsts might demand the US to take to bad left-wing governments, yes.) They helped install him, a process which was incredibly bloody and violent, even apart from the long-term effects of his rule: https://en.wikipedia.org/wiki/Indonesian_mass_killings_of_1965%E2%80%9366
Remember also that the same people are not necessarily making all of these arguments. Relatively few radical leftists saying the first two things are also making a huge moral deal about the US failing to help Ukraine, I think. Even if they are strongly against the Russian invasion. It’s mostly liberals who are saying the 3rd one.
I think there is something to this, but the US didn’t just “prop up” Suharto in the sense of had normal relations of trade and mutual favours even though he did bad things. (That indeed may well be the right attitude to many bad governments, and ones that many lefitsts might demand the US to take to bad left-wing governments, yes.) They helped install him, a process which was incredibly bloody and violent, even apart from the long-term effects of his rule: https://en.wikipedia.org/wiki/Indonesian_mass_killings_of_1965%E2%80%9366
Remember also that the same people are not necessarily making all of these arguments. Relatively few radical leftists saying the first two things are also making a huge moral deal about the US failing to help Ukraine, I think. Even if they are strongly against the Russian invasion. It’s mostly liberals who are saying the 3rd one.