Personally, the place where I grew up: the geography, people, and culture are permanently etched into my identity. So, yes in a sense it is brainwashing - but driven by biology.
Unfortunately, the rulers always want to deconstruct individuals and groups into fungible mechanical parts that can be used by the machine that continues their reign and authority.
Yes, I can separate myself from my past, but it sure doesn’t feel good. Why do we continue to sacrifice the life satisfaction of the small and weak to only give greater satisfaction to the powerful? Have so many become a product of this corrupted system, that their homelands no longer matter to them?