Raj has justified his tirade saying if Manmohan Singh can raise the turban issue with the French President, if TN CM Karunanidhi can raise Tamils' issue with the Malaysian govt, if Bengalis can rally for cricketer Sourav Ganguly, why can't he speak up for Marathis. Raj is not only citing wrong models but resorted to violence. It's like the student who justified copying saying he was only following what others were doing.
When in Rome, do as Romans: there are no two opinions on that. Every resident of Mumbai has to respect the local customs and traditions. If sommeone in Mumbai is not doing it, then that's the issue. And, the solutions lies not in making life difficult for them, but addressing the issue and sending out positive vibes on how important local traditions are.
In today's globalised world isolationism doesn't work. Parochialism can have a chain reaction, leading to catastrophic consequences. If Raj Thackeray is looking for an identity, if he wants to promote Marathi -- nothing wrong in that -- he must work on constructive models by pro-active engagement, not by dividing Mumbaikars.