This method of funding was used by both al-Qaeda and ISIS, and we're kinda surprised that the movie brings up the issue of funding, considering how the in-movie group could've presumably just tapped their biggest real-life sponsor, Osama bin Laden. Oof, there's that pang of hindsight again.
There's also Rambo III, which is set in an alternate universe in which the U.S. doesn't like long protracted wars in the Middle East and allows Rambo to f**k up the Soviet occupation forces on their behalf. And he does just that -- magnificently, we might add -- until near the end of the movie, when he's saved from certain death by the Mujahideen, those goddamn scamps. There's some debate over whether the movie was ever really dedicated to "the brave Mujahideen fighters of Afghanistan," but anyone who has watched Rambo III for even five minutes can attest that this screenshot going around is at least plausible. And hey, that's still less embarrassing than ending a movie with a Frank Stallone song.