See link below. It may still be a bit heavy on the bureaucracy and use of jargon, but in essence its content makes sense enough.
There is of course legitimate debate on the factors behind systemic racism and what should or shouldn't be done against it, like in Jeo's reply. At times you see anti-racists proposing measures or taking steps which very much give the impression that the quality of academic education or work is being sacrificed for the sake of increasing equity, so of course a lot of people would be opposed to that.
But it's definitely also just a new front that's been opened in the culture wars, politicians or media personalities stirring up controversy about CRT or more broadly race-related topics in education just for party-political advantage. Of course, on the Democratic / progressive side, there's been a lot of hypocritical virtue signalling, empty rhetoric and consultants jumping on a new way of making money, which all helped to provide the Republicans their fodder to turn it into a culture war issue.
As often with culture war issues, if you cut through the bullshit rhetoric and hysterical takes on both sides, you find that most people on both sides would agree to a remarkable extent on most points - but agreement and reasonable discussion don't generally help so much to turn out your voters...