Krauthammer is correct. In this one article he calls out Trump and Trump's chumps for their lack of perception (clear out wrong perception) of our place in the world and our mission to make the world better (more peaceful, more democratic).
But Krauthammer is late to this party, perhaps fatally so. President Obama was on target, he had a profound knowledge and sensibility, applied almost single-handedly while the Republicans did everything they could to oppose him, denigrate him, and garble his policy positions. Obama and his Secretaries of State Cliinton and Kerry were imperfect in application, but substantially correct on policy. And Krauthammer played his part of the GOP Amen-chorus with distinction.
Even now, he can't spare a word for the Democratic striving to keep the democratic world together and oppose the oppressiveness of the Russian regime, Chinese expansionism, and the Turkish coup-d'état in progress.
And he totally misses that Trump is not playing with a full deck.