I agree with post 61 except to say that it doesn't necessarily lead to cruelty to humans. That's all.
You agree that psychotoc killers frequently start out by torturing anamals, and that most of them have a tendency to consider both humans and animals to be walking meat, but you keep repeating that the torture of animals doesn't NECESSARILY lead to the torture of humans, as if the exception should be more important than the rule.
Who are you trying to convince here? Several of us simply pointed out the factual behavioral link between animal torture/human torture. So why is it so important for you to convince...err...whomever it is you're trying to convince that animal torture doesn't ALWAYS lead to human torture?
Like I said before : get help.