Since you had nothing to offer you chose to use the sentiments of naive Marathi folks who get waylaid by unscrupolous ways of nasty politicians. Suggest that you grow up and find ways to make mumbai a better place to live. Tell me which indian law prevents non-marathis to come to Mumbai? Do you think it would be appropriate if people in other states take a similar stance against Marathis? If you want to get few brownie points then there are several other ways
1. Think of developing infrastructure of Mumbai 2. Work for farmers who commit suicide 3. Improve the working condition of people on streets 4. Think of weeding out corruption
I assure you that votes will come directly to you and not to your rivals.