Raj Thakrey and Sanjay Nirupam are related by marriage. There was some property dispute between the two. Nirupam being an ambitious bihari started 'mobilisation', Raj the marathi retaliated. Few innocent people were killed, many lost their livelihood in the process. By the time, both relative might have patched up. For Raj cannot allow his BENAMI property to be grabbed by Sanjay Nirupam, his relative. In short, the turmoil had nothing to do with mumbai development or overcrowding. Rather Real estate mafia wants migrants to settle down to keep prices high.