Pakistan on its basis was formed on purely religious basis. Constitution was supposed to stay secular but later it became a theocracy. Now it is not and does not claim to be neutral on many grounds so much as protection laws of other communities and atheism are nonexistent practically .On the other hand ,India in its laws is secular state and is actually becoming one in practice as its incomes and education levels rise .So is it better we stand against partition and Pakistan's existence in first place .Like what would you choose at that time or the time at both sides majority becomes Atheists for what would we be fighting then .
It can sound controversial and unpatriotic but we didn't support these principles in the first place to begin with .It can be patriotic in a sense that we are uniting people of India that was once united .Are we patriotic to pre partition India ?
Second you could say that there are many people who supported Pakistan in its formation process and many people in army who are not Muslims .But if we at its principles what principles a Christian brigadier is preserving and fighting for ? We understand when we look into US as they are preserving freedom of speech , China their ideology .But what are these people conserving ,thing they don't agree with .It is like openly saying I am wearing blind folds .This state is not even secular in its constitution .So its born preserve thing.
Be open to debate ,don't judge just by patriotic norms and by raw feelings