Its because conservatives have actively meddled in the educational system, and kept kids from learning and practicing Critical Thinking Skills. At the same time, they used the vast Conservative Propaganda Machine to teach people to rely on Faith-Based Thinking, where they believe whatever they are told, no matter how absurd or outlandish, as long as it comes from someone in authority, such as a radio/tv talk show host, a politician, a preacher, a cop, a boss, etc.

Thats why they went so hard after evangelicals. They have already proven that they will build their entire lives around the most bizarre mythology and fairy tales written by neolithic goatherders, so all they had to do was get them to accept their political fairy tales, too.

Critical Thinking Skills are the most important part of any person’s education, and Conservatives have actively suppressed it. That’s why the Department of Education has always been one of their worst enemies. The 'liberal indoctrination" they are always screaming about are Critical Thinking Skills.