[a fool in paradise]

>>Texians moved into Mexico and didn’t assimilate. Migration destroys.

Does that mean that the people south of the border have to give up accordions and polka music?

[Theoria]

Conquerors do the conquering. It has always been that way. Demographic take over is another example. Many a folk lost land along the borders, some Spanish land grants were respected, other places were swept away.

[al_c]

Does that mean that the people south of the border have to give up accordions and polka music?

Nah ... the Germans and Czechs brought their own. It's all good.