What a bunch of crap.
The instructor tells everyone that you can't make judgements of people and their behavior based on what "class" they are in (race, gender, age, etc.). He makes it very clear that to do so is backward thinking and completely unproductive. Not conducive to a happy workplace at all - no siree.
Oddly enough, the balance of the presentation was a long, drawn out description of various special groups (classes) and exactly how they think, respond, and behave - so that we can all strive to accommodate and nurture these apparently homogeneous non-individuals for their eventual success.
Resistance is futile. You will be assimilated.
And just in case anyone gets the impression that I have something against Diversity - I don't. I think its great if approached with the proper perspective: