Trump-like behavior isn't the inevitable result of the US System though. We could've had another 20 presidents in a row who didn't go and break the norm of maintaining global alliances and not threatening to invade our neighbors and closest allies constantly.

So it's relevant to ask if this would still be happening without Trumps antics, even isolationists like JD Vance wouldn't force our allies hands like this.

Trump would have done nothing if he wasn’t aided and enabled by the rest of the government. There’s no indication this was a one off.