[eloff]

> Or maybe Obama, Trump, and Biden had different ideas about what "better for the USA" meant that led to them making reasonably rational but different decisions?

Yes, that's basically what politics is about in a nutshell, making different tradeoffs based on values. I'm not sure any of them actually had a sufficiently detailed analysis or model to justify having any certainty in their decision.

> But I'm not sure your assumption that all three of those presidents have a worse understanding of this issue than you do is justified.

Don't get me wrong, I don't understand the issue either. I'm just honest about that fact and merely espoused why it's a complicated dilemma. This is all unintentional consequences and it's not clear which was the best call for the environment, the countries involved, or the world at large.

I would have liked to see an in-depth study of the tradeoffs and a rational decision based on that rather than a political decision, which seems to be what we got all three times.