Do you ever think that whatever has been taught to you in childhood by the people, who are older than you, were correct in all ways? Were you ever question why they taught you something, which they taught you? Of course not, because at that age, every child has to accept whatever has been taught to them. In childhood, a child is in the process of developing his or her brain with the help of their surrounding.

Whatever has been taught to them was accepted by them, because at that age they don't have a mental capacity to understand what has been taught to them or whether that was right?

A Child's subconscious mind records every action, whether how to talk, how to behave, how to walk, etc. From their surrounding. Some child becomes a bully because of the same reason which they have seen in their surroundings in childhood.

When a child comes to that age when they have been able to comprehend between right or wrong advice. They must have questioned whatever has been taught to them and tries to change from within when they think that something wrong was taught to them in childhood.