Is "diversity training" a tyranny of virtue? Of course it is (see my two previous posts about benevolence yesterday). It's OK, I believe, to maintain a tyranny of virtue within the home as a parent, but public life and home life are not the same - and your ideas of virtue may not be the same as mine.
Interestingly, diversity training often leads to lawsuits (h/t, Insty). I much prefer greedy, nasty, flawed or corrupt SOBs to virtue tyrants.