There is an old saying about a little knowledge being dangerous.
“A little learning is a dangerous thing;
Drink deep, or taste not the Pierian spring:
There shallow draughts intoxicate the brain,
And drinking largely sobers us again.”
— Alexander Pope
Buying drumpf’s propaganda about NATO constitutes a little learning, very little, because not only does it show ignorance of reality, but it also shows a frightening propensity to take anything this mental midget says seriously.
If you really think that most of western Europe wouldn’t be ecstatic to see US troop leave, then you need to go visit western Europe, specifically where the US has its bases. American military are only slightly more welcome there than they are in Okinawa.