Why, what if they start killing them. We took them as refugees and most of them had no problem with it. Be it the Muslim, Hindu or Christian.
The Rohingya faced a very deep state in their country. The Buddhist are not what they used to be and they are going full mental. Together tied with Rohingya insurgency, this will only lead to chaos and many more deaths.
Keeping the fairness of the act aside. Who is their to condemn this, hardly anyone cares. Rather than few words from international community, has anyone even wiggled a finger against Myanmar?
This will only have a viable option of relocating Rohingyas in Bangladesh, may be make things difficult for Myanmar, but relocating them back is sending them for execution. Also, don't expect a UN safe zone in Myanmar, it comes directly over China's oil pipe line. So, forget any action from the UN.