I found this video to be informative on the reasons why Critical Race Theory has recently become such a big thing.

Why Is Critical Race Theory? - SOME MORE NEWS

Notes: I've been a fan of this guy's news show since back in the days when he was working for cracked.com--see my 2017 post here.  I think the quality of the show has dipped slightly since he left cracked--it's gotten a lot more shouty and grates on my ears more.  But every now and then it can still turn out a good episode (in spite of the obnoxious shouting).  And I found this one to be educational.