Why is a nation-state difficult to create?

Why Are Nation-States so Difficult to Create? There is no such thing as a perfect nation-state because the territory occupied by occupied by a particular ethnicity never corresponds precisely to the boundaries of countries: ... Each ethnic group recognizes and respects the distinctive traditions of other ethnicities.

Explanation:

First of all we have to define what a nation-state is and it is pretty much a Multinational State which is a country that contains more than one ethnicity with traditions of self-determination .

Because no state has a population that is 100% of a single ethnicity, every state in the world is to a varying degree multiethnic .

There is no such things as a PERFECT nation-state because the territory occupied by a particular ETHNICITY never corresponds precisely to the BOUNDARIES of countries .

In some multiethnic states, ETHNICITIES all contribute CULTURAL features to the formation of a single NATIONALITY .

's the question?