[Bazf]

Positive discrimination undermines the achievements of minority applicants who are accepted on their own merits; it is patronising and suggests they cannot be employed on merit alone. It also create's the impression that a minority applicant was successful only because of positive discrimination. In addition, minorities themselves see positive discrimination as being condescending. It is rarely advocated by the minorities themselves but almost always by the majority out of a misguided sense of guilt. It is nothing more than tokenism.
The introduction of positive discrimination could lead to a backlash against minorities. It would cause resentment in those who were turned away and this would be directed against those who were accepted.