This has been true for lots of things, not just "diversity", but every other whiz-bang new idea the Corporate masters decide in their posh offices to cram down the throats of the folks who actually make stuff. I was so happy when the copy-everything-the-Japanese-do fad collapsed.
You just have to learn some pre emptive self preservation tactics...like saying something about feeling harassed for age, color, sex, etc. out loud to no one in particular but where many can hear it...or accusing the boss of hating you because he thinks your gay...it won’t take long before you’re untouchable!