The Vietnamese and Cubans were funded by the Soviets trying to expand their empire. They were proxy war fighters for a nuclear power. Sure they were kind of rag tag but only because the Soviets considered all soldiers to be disposable.
The out of work tradesman going into the Fairfax VA or Berkley CA Whole Foods (IDK if either of these places have Whole Foods, but they seem like they could) in the year 2030 and dusting the avocados with anthrax won't care whether the anthrax is funded by China or Russia, just that it winds up in the lungs of the people who've run his country into the ground.
While I think terrorists should care who is using them and why, that wasn't my point.
My point was that the parent comment's examples weren't of a difficult to defeat determined population. They were warlords helping imperialists establish nuclear bases so the Soviets could project power. Everything else is just a fairy tale.
They tell all sorts of fairy tales to get soldiers to march into certain death and have throughout history.