It wasn't a dig. More of a placemarker to head off any distractions ....
Loss of civilization settlements in archaeology is specially noted when it comes to invasion of sites that understood how local climates worked and acted accordingly. The invasion looted and killed but eventually abandoned the site because no one knew how to manage it.
So much of what I "learned" in the 70s and 80s regarding history has been comprehensively overturned by archaeology.
"The Dark Ages" ? Anything but.
"Britannia was the arse end of the Empire" ? The amount of unique archaeology being uncovered suggests that is simplistic at best.
"The native 'Britons' were wiped out by the plucky Angles and Saxons" ? If only the DNA evidence supported that.
careful readers will notice how many of those old "historical" facts were the product of a very particular mindset that was extant in the Empire. Especially the Victorian age.
But we digress. Let's just get back to calling Trump and his cronies despicable cunts.