Want to know how they train killers?

My Grandson has been asking for a cat.
I said to him "why do you want a cat? you have a dog already?".
He said because he wants to find the hidden treasure.
I didn`t know what he was talking about so asked him to explain.
Turns out he wanted the cat so that he could kill it and cut open it`s stomach because there was hidden treasure.
He explained that this was what he`d learned from a cartoon"!!"
He had no conception of course what "killing" a cat really meant, he`s far too young.

But from what I know about many killers, i`ts that they started by killing small animals when they were young.

Makes sense I guess to evil minds to trick youngsters to turn them into possible serial killers.
What a sick society we live in.