This is a tragic accident. I repeat, an accident. I am appalled at the attitude from apparent fellow aviators on this forum who have a lynch mob mentality and a rush to judgement.
Given the information so far, the crew was an instructor and a student and I would imagine the instructor carried out the landing. It is possible the instructor sitting on the starboard side would not have seen the unfortunate victims who appear to have been struck by the port strut and port main gear leg. The port strut, I would suggest was bent by the collision with the man and the u/c leg struck the little girl. An investigator can be seen marking the leg with a tag.
A witness reported the a/c climbed after hitting the man, and it looks like the resultant stall caused the a/c to land nose down, bending a propeller blade and the nose leg.