It's far from the only place the policy is incoherent. They fired the top ranking officer at the US base in Greenland for having the temerity to tell their host nation "I do not presume to understand current politics, but what I do know is the concerns of the US administration discussed by Vice-President Vance on Friday are not reflective of Pituffik Space Base."
> the policy
The evidence is "incoherent" because the hypothesis is wrong. A policy for America isn't there.
In contrast, everything becomes exceptionally coherent if you instead ask what the policy is for Trump's personal goals: punishing disagreement, amassing wealth, rewarding apparatchiks, and always being in a room full of flattery.