It parallels the Bible fundamentalism popular among the conservative coalition in which while the whole of the Sacred Text is defended vociferously against all potential defamers and urged upon all heretics, literalist believers actually make very little use of the full material available.
For example, while Exodus 20 (The Ten Commandments) are a key part of Christianism's creed, I have yet to hear a sermon based on Exodus 21:
2 “If you buy a Hebrew servant, he is to serve you for six years. But in the seventh year, he shall go free, without paying anything. 3 If he comes alone, he is to go free alone; but if he has a wife when he comes, she is to go with him. 4 If his master gives him a wife and she bears him sons or daughters, the woman and her children shall belong to her master, and only the man shall go free.
5 “But if the servant declares, ‘I love my master and my wife and children and do not want to go free,’ 6 then his master must take him before the judges.[a] He shall take him to the door or the doorpost and pierce his ear with an awl. Then he will be his servant for life.
7 “If a man sells his daughter as a servant, she is not to go free as male servants do. 8 If she does not please the master who has selected her for himself,[b] he must let her be redeemed. He has no right to sell her to foreigners, because he has broken faith with her. 9 If he selects her for his son, he must grant her the rights of a daughter. 10 If he marries another woman, he must not deprive the first one of her food, clothing and marital rights. 11 If he does not provide her with these three things, she is to go free, without any payment of money.
12 “Anyone who strikes a person with a fatal blow is to be put to death. 13 However, if it is not done intentionally, but God lets it happen, they are to flee to a place I will designate. 14 But if anyone schemes and kills someone deliberately, that person is to be taken from my altar and put to death.
15 “Anyone who attacks[c] their father or mother is to be put to death.
16 “Anyone who kidnaps someone is to be put to death, whether the victim has been sold or is still in the kidnapper’s possession.
17 “Anyone who curses their father or mother is to be put to death.
18 “If people quarrel and one person hits another with a stone or with their fist[d] and the victim does not die but is confined to bed, 19 the one who struck the blow will not be held liable if the other can get up and walk around outside with a staff; however, the guilty party must pay the injured person for any loss of time and see that the victim is completely healed.
20 “Anyone who beats their male or female slave with a rod must be punished if the slave dies as a direct result, 21 but they are not to be punished if the slave recovers after a day or two, since the slave is their property.
So when conservatives talk about Constitutional "originalism" and Biblical inerrancy/literalism, they don't really mean it.