So, I would like to preface this by saying I dont support the actions of the Myanmar Goverment, I think they are taking a too harsh approach to the situation and should have used other venues of action.
That said, there have been religious and racial tensions in that area for centuries. And early goverments tried to assimilate the different cultures into their own, with success in some cases, but not in others. The Rohingya is one of those cultures that didnt want to assimilate. When they in addition have several extremist groups, their image are being tainted and the Myanmar goverment jugdes all of the Rohingya people in a similiar manner. A huge part of the Rohingya fled to Bangladesh when the understood that their cry for equal rights fell on deaf ears.
These atrocities is a huge shame aswell, seeing as the Myanmar has a rich and beautiful culture, a beautiful country and delicious food. All this is being tarnished since they are applying archaic measures of land control/population control.