The Bible is meant to be a guide on how you're supposed to try to live your life but ultimately you have free will. It has the basic laws and life lessons.
What you're talking about is an extremist type of Christian, someone who lives by every single word in the Bible. Not all Christians are like that and the ones that are, are usually the ones who have no idea what they've actually read.
This right here bro. This is what i try to tell my bible thumper brother and his wife all the time...but since they take every word in the bible literally, and are so close hearted when you try to debate with them, it not worth your time. They beleive they have the "so called holy ghost" and speaking in tongues, which i find funny time and time again. LOL