General Discussion

If he invades Greenland, which is highly unlikely due to the pushback he's already received (this is why he's switched to saying he'll "buy" it), yes, it will dissolve NATO.

It is a mistake to think trump ever does anything for strategic reasons. He flies by the seat of his pants and in this situation is mostly motivated to distract from Epstein. Furthermore, he isn't intelligent enough to put any strategic plan together.

However, the European nations will form a new protective alliance without the U.S. and it will be called something other than "NATO." With the way trump behaves, they are better off that way, anyway. In the last few days, a study was released saying that younger residents of the UK, France, etc., want a unified European approach. They will get something like that if NATO goes by the wayside.