The kind of people that voted for Trump, in a general sense, also tend to be the type of people that worship the police, are authoritarians on "crime fighting" (including on fighting victimless "crimes" such as the War on Drugs) and tend to have been very high on things like the Patriot Act, NSAA and other growths of the police state machinery. The logical conclusion of all of that is what we can see now, with cops drunk on power. Furthermore, cops are like monkeys and "monkey see, monkey do" when it comes to politicians who are always voted for, not respecting the constitution, which the large majority of conservatives agree with when it happens to be convenient (such as violations of the 4th amendment). Actions have consequences, and voting for authoritarians that support a "not so nice police" (thank Eric) also has consequences.