And apparently they have so spoken, when surveyed. Short of a massive personal bribes, I don't see that changing.
Nope. Bear in mind, I'm a guy that constantly castigates the US for what past administrations did in Iraq and Libya and other places. It doesn't mean it's not an admirable place to live.
Sure. First, if I've made any statements that claim to absolute certainty that the US will never invade Greenland, they'll be rendered foolish. To be clear, and before that happens, I think the probability is a number hard to distinguish from zero.
I'm very interested in that scenario, though, because I believe that the US is not really on any path to authoritarianism, and that its institutions and people will exert checks and balances. I will either be proven correct (for now) or wrong. With very high confidence (99%+) I expect the highest command levels of the armed forces to refuse to carry out an invasion of a treaty ally without Congressional authorization. To an equal degree I expect Congress to refuse to provide the authorization. To a lesser degree (but not much) I expect House Democrats to launch a bid for articles of impeachment based on the "high crime" of attempting to make aggressive war on an ally of a treaty ratified by Congress. Only slightly behind that probability I expect enough House Republicans to join them to pass the articles and send them to the Senate for an impeachment trial. I think that there is a better than 50/50 chance that enough Republicans will join Democrats in the Senate to convict. The most likely factor to derail impeachment is, of course, domestic politics, but probably not in the way most people would like to think. Republicans won't be the barrier; Democrats will. They'll weigh the value of leaving Trump in office to frame every political dispute against his black soul and the value of not elevating Vance to the presidency.
Downstream, Trump will lose almost all of whatever tiny fraction of Democrats and fraction of independents he holds, and probably a high majority of the middle ground Republicans who are not never-Trumpers but have been willing to assess him issue-by-issue.