I was indeed trying to explain that discrimination in real life in not binary but it is in game.
In the purpose of terminating separatism, indeed binary: self and the others. But one single action may contain many different purposes, for example, administration.
For example, in real life, country A’s official language is language A, while there is also a minority B. Even though B shows basically no separatism, A still wants to assimilate B — sometimes B wants to be assimilated by A.
An anthropologist work by a British officer whose title I forget, describe how southwest china was assimilated to Han Chinese in 17C perhaps: in the beginning the locals are basically aborigines, and then Han regime came, governing by Han Chinese language. The local youth learnt how to speak Chinese first and were proud of this, because being familiar to governing language means that they could get much closer to a better life. Then in several generations, the local language was given up, and a new Han Chinese community who has no Han’s blood was formed.
Then let’s turn to another work by Znaniecki and some guy whose name I forget. That work compared the degrees of Jewish, Italian and Polish being assimilated into USA society. The former one was highly integrated, the second one mainly live in their circle so hardly being assimilated, and the last one was in a middle range. Factors to that is kinda complex, so we need a concept to have it abstracted. Luckily in Vicky 3 there is a such concept,
Nationalism which I believe.
So actually there seems to be not that much necessities to consider the origin of nationalism, because there is nationalism in Vicky 3, as a technology, which I believe should be a reason why and how assimilation happened. But when nationalism doesn’t matter that much, like the SW china example I raised before, governing language matters.
And, to make things clear, the governing language is not the court language. The Mughal Empire use Persian as their court language but, they didn’t speak Persian to their subjects in tax day because no one spoke that. When England lost their authority in Ireland in about 14C, former Norman nobility in Ireland turned to Irish identification because they ruled Irish subjects. Manchu managed to maintain their identification because they were not that few, but indeed too few compared to Han, so Manchuria was not opened to Han immigrants until about 19C. Assimilation and discrimination should not be studied separately.