The gross mismanagement of their fine collection system contributed to the problem, but at it's heart this was clearly a problem that started at thge top, with the city council. and manager. This is likely why so many workers found it acceptable to send around openly racist emails on their work accounts - something only an absolute fool would do in any ordinary circumstance.
There are racists in any large group of people. Thus showing that there were some racists is on the level of water-is-wet. It's not evidence the system was racist.
I have never disagreed with mismanaged.