Bucktown (1975)

As he arrives in Bucktown to attend a funeral, Duke Johnson (Fred Williamson) witnesses an unknown black man getting beat upon by white police officers. It's a sign of things to come, because when Duke tries to go about his business he too has to contend with the corruption and racism that's rife in the town. Not one to back down, with the help of some old friends Duke fights back.
The violent methods used by the retaliatory force doesn't engender sympathy for their cause, it seems like the wronged party is as bad as the group that it fights against, but happily that's something that the script recognises.
As Blaxploitation flicks go, it does the job well-enough, and it doesn't hurt that it boasts Williamson and Pam Grier playing side by side.

3 double standards out of 5