Trump insists Ukraine should be Europe's business, not America's. Morally, that is partly true.
Partly, because America wilfully made Ukraine its business with the Budapest Memorandum, having put a gun to Kyiv's head and promising to guarantee Ukraine's sovereignty in exchange for nuclear disarmament. Well: Pacta sunt servanda.
But what I find interesting is this: If Trump wants America to leave the post-war security architecture of Eurasia, why won't he kill two birds with one stone and instead of indulging Putin and playing into his hand, tells him to talk to the Europeans instead?
That would be a real blow for Putin, and actually be useful for that very reason.
Well, a possible answer might be this:
Trump (and the people around him) want to leave NATO. They know the Europeans are far less willing to make concessions to Russia. They know this entails a greater-than-zero risk of some form of confrontation between the Europeans and Russia, which might then lead to Europe invoking Article V of the NATO treaty. And since Europe dutifully answered America's call when last Article V was last invoked, America would look stupid and weak if it refused the call.
That's a benevolent interpretation. The tragedy being a "premature" peace leaving matters unresolved is already planting the seeds of the next war. And then what? If you create a divided Korea or divided Germany kind of situation, you have to back it up accordingly. If you actually interested in maintaining peace, that is.
I'm afraid the reality boils down to Putin just pressing the right buttons, though. He's stroking Trump's ego.