It's interesting that Cuba, Iran, and even Venezuela all took as part of their identity some sort of adversarial position with the United States (although Venezuela was post-Chavez). The US is currently treating them, to some degree at their word at this point.

Whereas you could look at a place like Vietnam that fought its war and moved on, Trump's focus is largely dealing with actors that never did. I suspect the Saudi's won't be the only Nuclear deal signed. So much of this is just the cold war extended, but with North Korea and Iran trying to work their way past non-proliferation. The natural response would also be to arm South Korea and possibly Japan. All of which would have been the West's natural response to non-proliferation being violated.

I get the perception, but much of this is decades in the making and almost everyone involved including the US should have sued for peace years ago. Actual peace. Not, "we're not firing rockets but Israel can't exist."