Human behaviour more often is determined by worldly interests. Muslim homeland itself was product of worldly interests rather than spiritual homogeneity. It was thought by Mohammad Ali Jinnah and his Muslim League colleagues that Muslim political and economic interests would not be taken care of in the 'Hindu India' and that a separate homeland for Muslims is needed. The underlying assumption was that if a community of people who follow same religion will automatically have uniform interests. But this has been totally belied today as it ought to have been.
Religion can never ensure unity of interests.
In a democratic society various divisions surface which also become political fault lines. No truly democratic society can suppress these divisions which also ensure formation of identities. Diversity, in other words, is the lifeline of democracy and genuine national unity can emerge only from respect for this diversity. But in an authoritarian society these diversities are considered as sign of danger and is sought to be suppressed. The authoritarian society seeks uniformity and confuses uniformity with unity.