About 45 years ago is when I first saw the "Us against Them" mentality come in to play in police-citizen interactions. Now it seems to be a required doctrine for the job.
I’m into my Medicare years, so given that as a back drop, think of any 25 year old today and compare them to kids of the late 50s, 60s. Now, toss in a heavy dose of liberalism, watered down qualifications and the all important diversity aspect. Between me and you I wouldn’t call a cop today for anything but an insurance report.