If it wasn’t actually confusion, my thought is the same as yours. For somebody who used the term “shit-hole country” in a speech, referring to taking a dump as “dealing with (the) Afghanistan” seems like about the sort of 8yo boy humor he seems to favor.
I enjoy that humor too, but mostly in the privacy of my mind, and the company of my close friends. Not while being interviewed for a biography. Then again, Convict Donnie is well known for having no filters.
I laughed. 8yo boy humor is good humor.