Something else I've noticed is that "workplace diversity" has resulted in many situations where an employer basically has a two-tier system of employees: the ones who get their on merit and connections, and the "diversity pool" of all the others. What ends up happening is that the diversity pool groups simply end up competing with each other for positions in that pool.
Consider an employer, for example, that institutes an unwritten rule where 30% of the employees will come from the groups that make up the "diversity pool." This just means that the various racial/ethnic/gender groups that make up that 30% succeed at the expense of others -- but only at the expense of other racial/ethnic/gender groups in the diversity pool.
This is why I predict that inter-group strife between various protected classes is going to end up bringing the whole charade to an end.