Makes me wonder why nobody checked their work, parachute failures get investigated pretty thoroughly so it's not like you're going to get away with burning in a few hummers.
Though "Never attribute to malice that which is adequately explained by stupidity." Back in '90 or so I was on the ground crew for a jump they were doing to impress some Soviet generals and they jumped with too high winds which resulted in two arty canons and a sheridan tank burning in (they got to oscillating so bad the chutes collapsed) and three planes worth of troops ending up in the trees. Bad day to jump but made for an interesting day on the ground.
I think the wind died down temporarily just in time for the go/no go call...was on a jump where that happened and it was nowhere near a fun landing.
Thinking further on the heavy drop thing, from what I remember the crew who's vehicle it was were the ones doing most of the rigging with the riggers mostly just checking their work. Too many eyes for it to be an accident methinks.
"Johnny Lodern:
One issue is they where dropped from seperate aircraft, each crew is supposed to inspect cargo before drop, so there is more than 1 person at fault if it was not equipment failure."