Timing
The mission was at dusk, the most dangerous time of day and over a hot
area, so the 4000 feet is nonsense. There was no mayday call which
points to a bomb-like explosion.
Missile
C-130's have numerous anti missile systems making the $ 500 missile
story nonsense
Al Jazeera video
The video showed a remote launch with the plane coming down in one
piece and exploding into a fire ball. The area was a swamp and it
was dusk. The tape was a patch together version of footage the rebels
couldn't have. They never shot down a large plane before, so where did
they get the footage ?