My apologies, I should have been more deliberate:

The cause of peace will be hindered, but this won't entirely be Trump's (or Harris's in another timeline) fault because Biden already missed the boat on this at least two years ago. You can't board a boat that already left port.

The consequences of warmongering are meaningless economical and political sanctions, and a halfassed proxy war from the sanctioning side; this is set in stone now and there's no going back. Peace is actually valued quite low despite narratives to the contrary, as it turned out.

I'm more "glass half-full" than you are on Ukraine's chances of avoiding a worst-case outcome (assuming support continues, even at roughly current funding levels). And as far as the interests of the US are concerned: guaranteeing that Russia's regime understands that it simply won't be allowed to pursue further adventures of this sort.

But at least I can see where you're coming from.