The modern "diversity" is just another appropriation of the Left to divide and weaken America. It's just like "liberal", "common sense gun control", "progressive", "comprehensive immigration reform", "reproductive rights", "living wage", "socialism", "climate change", "racist", etc. Words and phrases that sound so logical and unassailable yet are totally devoid of their real meaning.
The forces of globalism know they can't win in a stand-up, head-on, war of ideas. So, they will apply these (as I call them) wedge issues to drive us apart - we end up fighting each other and making ourselves easier to take over.