Jesus came to give life, and to have it more abundantly. Killing is not life more abundantly!
Exo 20:5 You shall not bow down to them or serve them, for I the LORD your God am a jealous God, visiting the iniquity of the fathers on the children to the third and the fourth generation of those who hate me,
Exo 20:6 but showing steadfast love to thousands of those who love me and keep my commandments.
Obviously kids emulate their parents. They do what they see their parents do. If parents do wickedness so shall their children follow suit.
They don't have to act like their teachers, but they usually do.