rather than making a issue against the biharis/up/keralite, it is essential, to maintain the local homogenuinity, then why did we fight the british because of the demographic change etc, is never helps the settlers and the locals, the best way is to do full thrittle development of UP/ Utananchal/Bihar/orissa/telangana, and spare all the city slums, all those mumbaikars, and non maharastrians who clam for settlers should vacate the city for their new bretherns to be accomodated , if they are sympethetic, and or make them paying guest. please spare the city , i am a hyderabadi