Both BB & the contestants are to be blamed. Physical tasks were always a part of Bigg Boss. The contestants have taken it to an extreme level. The victim has never taken a strong stand against it either like in previous seasons when all the housemates would unite against physical violence.
Only Mahira & Bagga took a strong stand and both were ridilicous stands. Mahira & Paras were lying & Bagga's would barely qualify as a push.
It's on both IMO.