There are few basic points that everybody needs to be understand..
Every area has its own culture and no one wants its culture to be destroyed by outside migrants..
People from Bihar and UP are migrating outside because there is no security to life and property in these states, there is total Anarchy in those states..
If law and order is established in these states with IRON hand investments will automaticall come to these states as these states have huge business potential, and as more job opportunities are available they shall not migrate outside..
When people from these states migrate to other states like Maharashtra, they also create base for the incompetent, currept leaders from their states, this will not be accepted in any other states..
Basic problem is ANARCHY IN BIHAR AND UP which should be dealt with iron hand.. otherwise people from these states will export anarchy to other states (which they have successfully done so far as these state send bulk of MPs in the parliament) and will result in BALKANIZATION of this country..