If I am not mistaken, India and Pakistan was once a "One Country" not until after 1947 when they were separated from each other. So there is No Doubt that an Indian can marry a Pakistani (and vice versa)since they originated from the same land and have common ancestors. And it is not only between Indian and Pakistan. Any other different nationalities can marry each other if they will really want provided they Love each other or perhaps learn to love each other.