Just seems like baseless speculation, another attempt to rationalize what occam's razor can much more easily explain with long-established egomania or senility.
Mmh yes and no. There are two arms in this hypothesis and you can summarize the second one (the main one) as basically wanting to piss off / punish the Europeans. This is perfectly on point and fits the character.
Occam's razor might well describe actions of a cold calculating leader. But of Trump..?
