The pile of hair seems a bit contrived to me indicating propaganda. Although I have no idea what (if any) grooming habits they have, I have a hard time imagining a group of 50+ jihadis standing around cutting and shaving their beards off, and then tossing them into one big pile.
If you have seen the videos of the relentless fighter-bomber, attack helicopter, and cruise missile strikes, I don’t find it difficult to imagine at all!