I don’t think it is super complicated, Brian.
White parents are opposed to the teacher’s unions indoctrinating their kids in Wokeism. CRT isn’t taught in K-12 public schools, but that is a dodge. It is like saying Catholic or Calvinist theology isn’t taught in Catholic schools when kids are being taught lessons based on Catholicism or Calvinism.
Note: Isn’t the “insurrection” a misleading slogan?