Looking at the TAF, METAR, and form 415 it is unlikely that the flight encountered much turbulence, certainly not enough to cause a serious accident.
Passengers reported that the whole flight was turbulence-free until seconds before the crash the plane started to shake vehemently. As for Rainboe's usual foaming rage explosions, in this case I report what people are saying they've seen actually happening. I've never claimed any experience which IMO only counts when you were on that plane cq. saw the crash happen. So, what do YOU know?