Honestly, the question comes down to indoctrination. Republicans play very long games. They see themselves as losing now, but if they can control the education system and mediate what the next crops of voters know and think, then they can make sure that they start winning again. They have been dismantling it for decades, but it was quiet, and slow, and they made sure to avoid making waves so their agenda didn’t get noticed. The current barrel of monkeys in the post-Trump world are trying to be noisy and forceful and are getting caught. Take a long look through the history of state and district decisions regarding coursework and guidelines for educators and you will see pretty quickly who had political motivations and who was trying to make sure the population stayed dumb, docile, and pliant.