A religious settler says that killing children is a religious doctrine encouraged by the Torah

A religious settler justifies killing children without mercy, and says: There should be no mercy for children; Because they will grow up and be worse than their parents.
It is based on the Torah, Chapter 20, Verse 16, which says: “Do not allow anyone to remain alive as nothing,” and Chapter 25, Verse 19, which says, “Totally wipe out the Amalekites,” meaning men, women, and children, meaning that men, women, and children have no right to exist. .
Is it now clear who carries the extremist ideology and what it is based on?