It comes from being willing to actually ask questions and observe the world to find our answers, rather than an unwavering loyalty to an ideology. In this case these fucknuts are taking their religious beliefs, based on nothing, and prioritizing them over actual science.
That phrase "based on nothing" is where you lose religious people, and expose your own belief system that isn't based in fact but supposition.
Don't get me wrong - I'm from Gilbert, AZ, and that lady had no business forcing her religious beliefs down everyone's throats and tearing out sound science because she was afraid of her beliefs not being equally represented. That kind of fear-based action is dangerous. It also gives religious, educated people a bad name.
Don't assume all of us religious people are "fucknuts", however. That's a broad stereotype that's just not fair to those of us with an open mind, have real faith in God, and want science to push forward unimpeded by any ideology - athiesm or fundamentalist.
People out there have had "spiritual" experiences that as are real as seeing the sun rise in the morning but can't explain easily or won't explain for fear of mockery at the hands of those who believe it is based on nothing. This lack of communication is often what leads to intellectual standoffs over crap like this textbook fiasco.