Most diversity and implicit bias trainings are not effective because they are based on empathy rather than compassion. Having empathy, instead of compassion, as the basis for addressing racial bias is akin to using water, instead of a metal cover, to put out a grease fire. Empathy based trainings have done nothing to reduce the growing societal fires related to bias such as bullying and hate crimes.
The Federal Bureau of Investigation (FBI) reported that 2020 was a record year for hate crimes in the U.S The number of "recorded bias incidents" by the FBI in 2020 was the highest in more than a decade and that was an increase of 6% compared to 2019.
In terms of where Americans work, and where diversity trainings have been the norm at large firms since 2005, a 2019 Deloitte survey of 3,000 workers showed that 64% of them "felt they had experienced bias in their workplaces during the last year." In 2016, according to research conducted by Georgetown University, nearly 66% of Americans said that they were bullied at work as compared to 50% in 1998. If diversity and implicit bias trainings are working, we should be experiencing decreases in hate crimes. 
Dr. Chris Kukk
A central problem of such trainings is that they are really empathy trainings. And the problem with empathy as Paul Bloom, in Against Empathy, and others have shown is that "Empathy is biased, pushing us in the direction of parochialism and racism." We (all human beings) tend to be more empathetic to people who look like us and have similar backgrounds relative to people who we deem to be different.
Empathy is centered around the person seeking understanding rather than the person that needs to be understood. If you are practicing empathy, you're searching for feelings and emotions to put into yourself. When you are trying to "walk in someone else's shoes," as the empathetic motto goes, it is centrally about you wearing the shoes but not necessarily walking with the person who is suffering.
Compassion, in contrast, is other-centered. When you practice compassion, your search is about understanding not only another's problem or suffering but also their perspective and experience (i.e., their walk) with the problem. When you are compassionating, your goal is not necessarily focused on someone else's ‘shoes’ but on learning about their ‘walk,’ especially in the middle of a problem, so that you can help them through it. It is not your walk that should be the center of attention or concern, but theirs.
The fuel or 'oxygen' of bias is self-centeredness and empathy's egocentricity, as compared to compassion's other-centricity, feeds the fire of an us-versus-them perspective.
