Different groups have different beliefs.
The people of Waknuk believe that mutation is dangerous and needs to be destroyed. Because the setting is a post-apocalyptic world, this belief probably developed from a need for survival and started out (at least in terms of crops) as a legitimate need. Unfortunately, they found a very cruel book along with The Bible as they were developing their belief system, and they now interpret God's word as only accepting of a certain kind of human being. Nothing different is allowed.
The fringe people believe in survival, and some of them question the beliefs of Waknuk and the surrounding communities... because they see the value of the people around them. However, since they are mutants, they have been pushed to the edges and don't have enough good land to survive, so they have to fight and raid to get enough to eat. Their belief systems don't seem to have had a lot of time to evolve beyond the Waknukians. :)
The Zealanders seems to believe in developing and breeding for telepathy, which to them is the superior way to be, and if they happen to genocide some other groups in the process, they don't seem to care.
David's group of telepaths seem to believe in learning and in surviving... and luckily a few of them get a chance to do that.
Tribulation
bang
The Chrysalids was created in 1955.
mutations, people have to start from zero again
he is a family friend of the Strorms in the book chrysalids
The ISBN of The Chrysalids is 0-14-001308-3.
Basically that telepathic people were an improvement on normal people, and savages didn't matter.
David's last name in "The Chrysalids" is Strorm.
Well firstly, what are the questions to the Chrysalids Chapter 13?
In "The Chrysalids," people are violent towards those who are seen as deviant or different in terms of physical appearance or abilities. This violence is often justified by religious beliefs and fear of contamination from the Old People. Additionally, the strict emphasis on conformity and purity in society leads to harsh punishment for those who do not meet the established norms.
The Chrysalids is set on a post-apocalyptic future Earth, so the old people are us... the people who used to live on the Earth, and who eventually caused the probably-nuclear apocalypse that led to the future presented in the book.
An example of an external conflict in "The Chrysalids" is when the Waknuk society discovers that David and other telepathic children have deviations and perceives them as mutants. This conflict involves the struggle between the telepathic children and the society's strict belief in genetic purity, leading to persecution and fear for the children's safety.