India tried this. BD government didn't give a shit. And the Chakmas are terrified to go back. There land has been taken over by Bengalis in BD. So you are back to square one.
Did you seriously think that India didn't think of repatriation? Remember we can't use force.
This is already the case. Chakmas, Rohingyas, Tibetans are housed in camps inside special zones set aside for them.
Did you seriously think that India simply let them loose among the general population?
Move them where? If we move them to some other province the local people in that province will start whining just like the Mizos are doing now.
Absorbing a small number of people from an ethnic group is easy when you have the same group living on this side of the border and they make up 90% of the population. This is what China did. India isn't homogeneous like China. To make matters worse, Chakmas are a small group, spread over a large area where they are intermingled with other tribes. There is no specific Chakma 'homeland' on the Indian side. If there were, we would have moved them there like we did for Punjabi and Bengali refugees in the 1950s.
Your ignorance on the subject matter is astounding. Not just that, you lack even basic common sense when talking about a sensitive issue like ethnic conflict and refugees.
There are regions which are more or less sensitive to refugees than others, the one where protests were held is clearly a very sensitive one when it comes to this subject. It all comes down to India's failed state and government, corruption and incompetence.