Diversity is being legislated and made into a political football for one single purpose -- to divide this country (as outlined by Saul Alinsky in his infamous guidebook for radicals). The more you can pigeon hole people into special interest groups under the guise of diversity, and appeal to their "special status" as a way to pit them against other special interest groups; the more power government demands as a way to arbitrate the disputes among the special interests.
Contrary to what the progressives and the educational establishment teaches; It isn't diversity that makes America great -- it's the things we all have in common as a people that make us great. Common sense values, the importance of the family unit as the fundamental core of our society, and most importantly the belief in American exceptionalism as it impacts all men regardless of race/creed/color.
Leftist Alinksy followers knew full well (even back in the mid-20th century) that in order to undermine our country, they would first have to denigrate/destroy our institutions (family, church, schools, and eventually government) -- Diversity was/is one of the weapons they chose to achieve these goals.
I had a very leftist Professor back in college in the 1970's -- more left than most back in the day, and he was a committed Alinskyite. He let it be known publicly in class that his goal (and that of many of his peers) for the long term was to divide the races (through diversity), take over the K-12 schools, and destroy the religious base of the United States. Almost fifty years later, as I look back, I tend to believe they almost succeeded.