Shiv Sena president Uddhav Thackeray on Wednesday wondered why former ally BJP felt the need to hold "so many" election rallies by Prime Minister Narendra Modi in Maharashtra."They say that there is a 'Modi wave' in the state. This is not Gujarat. If there is indeed such a wave, then why the BJP has planned so many rallies by the prime minister for the state elections?" Thackeray said talking to reporters here.