Q explains this in terms of the bigger picture here.. I disagree with "NEVER BACK THE BLUE!!!!" because there are good men and women serving as police officers.  However, some of their leaders are beyond reprehensible.  Returning power back to WE THE PEOPLE involves removing those who are reprehensible.  Since this travesty has, as you point out, been happening since the early 1800's, the process will take time.  WWG1WGA!  Blessings.