If you want to know how Ghazwa-e-Hind would be like, look no further but at the Yezidis in present day Iraq!!!As long as Islam has Kafir lands to attack and plunder in name of Jihad, Muslims are united. The moment the kafir's don't give the Muslims that opportunity by being too strong to be defeated, they turn on themselves and attack each other. Take Pakistan for example, earlier it was the Hindus and Sikhs who were the scapegoats, then the Christians and Ahmadis. Later it was the Shia's and now the more extreme Sunnis against the rest.
This is why the promise of Ghazwa-e-Hind is so popular concept in Pakistan.