As a non-american, the speed with which trump has dismantled international relations and the lethargic (even non-existant) reaction of the “checks and balances” that should prevent such things says to me:
If America has done it once, America can do it again.
It can spend 30-50 years building strong relationships, or it can devastated them in 1-2 years.
Seems better to work without America, and let America do it’s own thing.
If America wants to join in, fine. But it’s gonna be on the world’s terms, not Americas.