And everyone has been historically the enemy of Indians, look at northern Indians they invaded India and brushed aside the real Indians.
If you wish to be spiteful and bitchy, you might spare us the agony of added inaccuracy.
Genetically, there is nothing to show the separate existence of 'northern Indians'. There is only linguistic evidence. The general Indian population so far outweighed the number of immigrants that there is very little addition to the gene pool due to immigration. Nobody invaded India and brushed aside 'real' Indians. Some small numbers migrated and merged into the population.
It is clear from an analysis of the spread of the Indo-Aryan language, then of Prakrit, both as Sauraseni and Magadhi, that the significant cultural changes that accompanied the language eastward was led by a key component of the migratory families, and that key component very successfully preached the Vedic pantheon and its supremacy, and replaced much of what may have been the religious beliefs that prevailed before their coming. However, the process was inclusive, not exclusive; elements of the old religion were very significant, too, in the new theogony, and it is clear that the classic Hindu religion of the middle of the final millennium BC was a composite of Vedic and acquired faith.
What is ironic is that only the Pashtu population is distinct and separate from the general mass of the population. The implication, and reason for calling it ironic, is that you, for instance, have nothing in common with your Punjabi and Sindhi compatriots; they have more in common with other north Indians than they have with you; and they even have more in common with south Indians than they have with you.