You had to reach back 50 years to find US support for dictators.
> they just often happen to be with dictatorships
No, they always happen to be with dictatorships. The motives of US politicians are not relevant to this fact (I personally think Trump is corrupt and incompetent); the US system is democratic enough, and Americans are moralistic enough, that even corrupt and incompetent politicians can't get away with military adventurism except with dictatorships. Thus the end of that Greenland nonsense.