It's Only A Racist Stereotype If It Comes From A White Person
Hans Bader blogs about "diversity training" at OpenMarket.org -- how it can backfire on the employer and lead to lawsuits, and how those doing the training can throw out racial stereotypes:

For example, Glenn Singleton, a wealthy "diversity" trainer, has claimed that "white talk" is "impersonal, intellectual, verbal" and "task-oriented," while "color commentary" is "emotional." If a white person said this, it would rightly be regarded as a ridiculous, racist stereotype that relegates black people to inferior status. (California Superintendent Jack O'Connell, a white liberal, was publicly embarrassed, and called racist, after he repeated a belief that Singleton shared with him that black people are loud. Singleton also embarrassed the Seattle Schools in a landmark Supreme Court case.)

Major employers have paid out millions of dollars in discrimination claims because of diversity-training programs. One Fortune 500 company paid out tens of millions of dollars in response to a class-action racial discrimination suit by minority employees, which was fueled by remarks managers made after undergoing mandatory diversity training (they joked about jelly beans used in the training to represent minority employees. That, coupled with a poor quality recording in which a manager's reference to "Saint Nicholas" was misinterpreted as the N-word, created a furor).

Diversity training triggers workplace conflict and lawsuits, by compelling employees to talk about contentious racial or sexual issues, with resulting acrimony, and remarks that are misinterpreted or perceived as racist or sexist. For example, in Stender v. Lucky Stores (1992), statements made by managers during sensitivity training were held by a court to be evidence of discrimination. Some judges take a dim view of diversity training. In Fitzgerald v. Mountain States Tel & Tel. Co. (1995), where employee reactions to diversity training gave rise to a lawsuit, a federal appeals court noted that "diversity training sessions generate conflict and emotion" and that "diversity training is perhaps a tyranny of virtue."