I'd really like to know wtf happened there, says run off the road but looks a lot more like 'run over' if it did just run off the road and roll obviously the structure of the cabin compartment isn't that strong - they shouldn't just flatten like that.
WJs are safer than a patrol or land cruiser, especially in a roll over (US laws are stricter than here with roll over protection). It must have come to a halt a serious speed or rolled over a number of times before coming to a rest.