AIMIM leader Asaduddin Owaisi and Azad Samaj Party (Kansi Ram)'s Chandrashekhar Azad have joined hands before the UP polls, saying that they intended to stop the BJP from returning to power in the state. But political analysts, experts and election arithmetic explain why the alliance of parties centred on Muslims and Dalits could hurt the SP-Congress combine more than the BJP-led NDA.