You do realize that almost all of those links showed that the people who used "police state tactics" were in the wrong and were either fired, successfully sued or otherwise forced to admit they were wrong.
I'm not saying it never happens. People in power sometimes overstep their bounds. It's not right, but it happens. In the cases you presented, many showed how the system works even when it is the police or the prosecutor(s) who are in the wrong.
Of course, misdeeds which make the news are the tip of the ICEberg (I'm so impressed with my puns!) will be
disproportionately addressed for correction. I've seen many abuses of power which just never attract attention.
But the greater problem is when gov't seizes more authority over us, & it's seen as entirely legitimate by the sheeple.
Even on this forum, posters have supported the USSC's decision to let cops strip search anyone they arrest as often
as they like for any infraction, no matter how minor or mistaken. People
like to lose liberty if they feel more secure.