Not really lol, those other communities have much higher fertility rates, Pakistan only got more than half of punjab because of the demographics favouring the Muslim population - because of the consistently high fertility rates between Muslims (sure many were forcefully converted, but it's difficult adapting to an Abrahamic religion, from an Indian religion) .
edit: Same case with Muslims within Punjab right now..... within a few decades you'll see Sikhi die out (because of low fertility rates more than irreligiosity), you'll see more Hindus become atheists (though the Indian census won't likely accept atheism), and Muslims increase fast in population %.