The Time magazine article creating "the gateway drug" myth in the 1970s provided no citations for its claims, except ambiguous references to unnamed “experts.” The evidence remains elusive 40 years later.
The true aim of these “scholar activists,” as many academics have begun calling themselves, is to propagate socialism by redefining capitalism to encompass every evil of human history. Which means they're mostly attacking straw men.
Abuse of power by police won't magically disappear if racism does. There are still plenty of reasons for police to abuse power, and few reasons for the public to believe that police will be held accountable.