First: It's completely within the power of communities to NOT fund their police, but most of them want to fund the police. I highly doubt it's because they believe their police are building gulags / exhibiting secret police behavior, or because, you know, "no matter what protect the thin blue line because we're conditioned as a police state!"
Second: Militarization of the police is much more a result of the recent terrorist attacks and surplus equipment and military training from the Iraq / Afghanistan wars than anything having to do with the cold war. (Focus on response to mass shootings with automatic weapons, requiring / wanting to wear body armor, etc vs. community policing approaches have different perceived risk profiles)
Third: I'll give you the prison industrial complex is a thing, but there is simply no data in the article presented about overall private prison usage vs. publicly funded prisons. I think private prisons should be outlawed, but a quick look yields 8.5% of people incarcerated are in private prisons. https://www.sentencingproject.org/publications/private-priso...
The hyperbole in this article is offputting, doesn't help the purpose of the author, and honestly misses so many facts about postwar military spending and WHY that it boggles the mind of any reader with any sort of background in this. Hard pass next time.