Simulators do not include fuselages or actors playing the role of passengers.
In other words, even if your request to learn how to turn an airliner but not to land one didn't get anyone's attention... if you and four other guys arranged the class into rows behind the simulator and whipped out boxcutters while shouting "Allahu Achbar! I have a bomb! Stay seated or we will do this!" and then grabbed the student playing the role of stewardess in a mock throat-slitting, all before charging the simulator door and attacking your flight instructor, I think even the most dense instructor might suspect that you were practicing up for a hijacking.
So yes, it would be most helpful to have a place to train outside of the US, and it would be very useful to have a mockup airliner where you could practice in the same confined space with all the right seating, with other thugs playing the role of passengers, with a cockpit area which you could charge into and overpower a crew. The more realistic the better.
"Simulators do not include fuselages or actors playing the role of passengers."
Neither does empty outdated fuselages. It's absurd to believe that these fuselages over there served as serious training ground for terrorists when they came over here and got trained on up to date planes, simulators and flew on the SAME flights routes WITH passengers that they later used in the hijackings. NOTHING beats the REAL thing.