Dropped from 15,000’ ? Our people flew over there and dropped supplies from 15,000’ and they exploded on impact.
There are a lot of questions here
15,000 feet is the max range for most MANPADS.
A C-130’s only defense against MANPADS is flares. The C-130 is about as maneuverable as brick with wings. The crew was likely ordered to stay above the MANPADS engagement envelope.