@InfraBlue,
InfraBlue wrote:
"Them" are the perpetrators of the 9/11 attacks.
The author says "suppose they'd killed the president...and drove the country into one o the worst depressions in its history and
had to call on the state to bail them out."
Here, "they" are terrorists who killed the president and "had to call on...", that is, the subject of "had to" is exactly the perpetrators of 911.
Two possibilities for this:
(1) the author made a grammatical mistake.
(2) We's misinterpreted the meaning of "had to call on the state to bail them out."