Our CL-601 is limited to 10kts tailwind/24kt Xwind. The Challenger don't have leading edge flaps, and you land it without (or very little) flare because it tends to float. I asked one of my pilot about that crashed, and said that probable after it hit the runway and bounced, probably stalled(or near stalling) and stick pusher did the rest.
Still stupid after the 1st overshoot with those conditions