Are Political Correctness and Diversity Mutually Exclusive?

In 1987, the Associated Press Stylebook contained an entry under "handicapped," a first for this category. The appearance of the category was the result of work by organizations for people with disabilities to change the way in which reporters and editors wrote about disability.
Since then, many organizations that support people with disabilities have produced sets of guidelines for avoiding demeaning and sensationalized words and phrases when writing about people with disabilities. The fact that so many groups see this as an area for concern should alert journalists to the fact that the way they use words does matter.
At the same time, there is an increasing focus on encouraging diversity within organizations. Doing so results in divergent ways of thinking which can lead to more robust ideas. This is in stark contrast to like-minded people who come up with convergent ideas. Along with diversity, sensitivity training has also become important. It is seen as a way for members of a given community to learn how to better understand and appreciate the differences in other people. The goal in this type of training is more oriented toward growth on an individual level. Sensitivity training can also be used to study and enhance group relations, i.e., how groups are formed and how members interact within those groups.
The critics of sensitivity training claim that such training is not really designed to help people be more sensitive to other people's ideas and feelings, but it actually changes one's attitudes, standards and beliefs. These critics argue that sensitivity training merely wears people down until they conform to the mentality of the group, and forces people into complying with community directives to conform to standards of political correctness. Political correctness has been defined as "avoidance of expressions or actions that can be perceived to exclude or marginalize or insult people who are socially disadvantaged or discriminated against" or the "alteration of language to redress real or alleged injustices and discrimination or to avoid offense." While political correctness seems like a good thing, opponents of the political correctness movement argue that it represents a totalitarian movement toward an ideological state in which there is 100% conformity.
Many employees who go through sensitivity training sessions feel that only certain groups were being asked to be sensitive of the others. On the other hand, proponents of the PC movement assert that it makes each of us a bit more sensitive to the challenges that our fellow citizens may face on a daily basis. Despite these differing points of view, sensitivity training will continue, and employers and other organizations will continue to assess whether its effectiveness warrants the costs.
http://www.ragged-edge-mag.com/mediacircus/styleguide.htm
http://www.americasbestcompanies.com/blog/senstraining.aspx