What you presented is the effect, not the cause.
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The ultimate cause are the people of this nation. They are most responsible for public schools. US citizens either broadly don’t care what is taught, agree with what is taught, or do care but are too lazy to stop it.
Increasingly we might have to face the fact that we have less in common with many of our countrymen than we thought. In a nation of roughly 330 million people that’s an unpleasant reality.
I try to keep myself aware of the every day.
Matthew 7:13-14 “Enter by the narrow gate. For the gate is wide and the way is easy that leads to destruction, and those who enter by it are many. For the gate is narrow and the way is hard that leads to life, and those who find it are few.