It is possible to refrain from oversimplifying (all police officers are "bad", all unions are "bad") while still synthesizing a plausible theory: Police union

It is possible to refrain from oversimplifying (all police officers are "bad", all unions are "bad") while still synthesizing a plausible theory: Police union interests are aligned with the interests of drug cartels and other grave threats to society, for each keeps the other relevant.