You are comparing Korean and Chinese war camps to US military boot camp?
1. You are separated from your friends and family any time you travel. You make knew ones quickly. This point is moot.
2. You aren't force to make any changes beyond how you read time in terms of language. That is for practical purposes. Think about it. I'm sure you can figure it out.
3. OH NO I SHAVED MY HEAD WHO AM I?
4. Yeah, now I'm wearing a uniform and I don't know who I am either. Are you kidding me with this?
5. Pack mentality. <--- Yes. Very much so, however not in a way that destroys the self or makes you not see right from wrong. In fact, identifying moral right from wrong is still kept very important. It is up to the lower ranks to question the higher ranks when they begin to do things that aren't right. The "pack mentality" is all about protecting your brother. Which, by the way, would create a bias AGAINST police brutality, because the police are fucking up your brothers.
6. None of the training in boot camp is focused on changing ideology. Sorry. You are just wrong here.
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All that being said. You are still arguing something that I am not. Military training IS conditioning. I don't consider it brainwashing, but that's up to the individual to decide what is "significant" ideological change. What we are talking about here is if military training creates a bias that would make one side with police over civilians. It doesn't. Everything we are taught is that we are there to PROTECT civilians. If "brainwashing" to the level that you are suggesting exists (it doesn't), then it would have the opposite affect of what you are saying.