Trump’s theory is the correct one. Do nothing until you have to do something. Then do it fast and dirty so it never has to be done again.
I believe the theory can work in some/many circumstances -- but clearly not all.
Take the disaster that is the latest version of another war -- Israel v. Hamas.
That disaster has been brewing since the early 20th century. There is no right side -- only wrong sides and many wrongs!
A few world leaders over the last fifty or so years have tried to resolve the mess, but in the last twenty years, the effort to resolve the dispute has waned, or even worse (picking one side or another).
There are logical arguments on both sides and in the case of the Palestinians, generations of hate that build with each generation to the point where we find ourselves today -- Armageddon.
The ISIS-like attacks on innocent people are horrific and must be avenged. BUT, the real blame lies with the so-called leaders of the free world, who should work to resolve this mess through diplomacy. This disaster was actually created by the British over 100 years ago.
Until a reasonable agreement can be reached, this war will continue and could easily spread to the world.