I've brought this up before: US law enforcement has a long-established training relationship with Israel. Is it any surprise that American police have a "siege mentality" when they are being trained by a country that is basically dealing with a multi-decade insurgency/hybrid war?
https://progressive.org/dispatches/us-police-trained-by-isra...
When the matter of police training is raised, much consideration is given to the training police aren't receiving but should receive. I think too few consider the matter of training the police are receiving but shouldn't be.