You are either being obtuse (most likely) or simply unable to grasp that there are psychologically damaged people who will act out fantasies of sex and violence. Both Raff and Amanda had strong anti-social fantasies before the murder. That's not to say everyone who fantasises acts them out. However, get two - or three - unstable sociopaths together (cf Venables and Thompson; Leopold & Leob, Bonnie and Clyde, Klebold and Harris, the Manson Family) and one acts as as the catalyst to the other.
There's a strong "whack-a-mole" approach to every PGP argument. You always take each issue currently being discussed as if it doesn't exist in a broader context. For example right now you're arguing as if the PIP's only claim is Amanda and Raff seemed liked normal kids therefore they're innocent no matter the evidence while you point out that seemingly good kids could be secret psychopaths. Or if we say the evidence is weak you would go, ah but they're clearly evil kids and therefore guilty. But they're not evil kids...well kids that don't seem evil could be secret psychopaths...whack-a-mole.
This case is extremely unique among wrongful conviction cases in that there are multiple independent factors corroborating the weakness of the case. No PGP ever seems to acknowledge the factors as a whole taken together. Another case currently being discussed on this board is Steven Avery, well whatever the truth is there the fact is the case for innocence hangs on one factor, that the police planted evidence. If they didn't, it instantly becomes a pretty watertight case.
Let's consider all the factors in the Knox case:
1. The prosecution's evidence, even taken at face value, is weak at best.
2. The prosecution's crime theory is incoherent and logistically improbable.
3. The prosecution conducted illegal unrecorded interrogations that resulted in the arrests of at least 1 completely innocent person(s) who also claimed they were abused during the interrogation. At the time of the interrogations and arrests they had no evidence against their suspects of any kind. It would be substantially fortunate for them if later evidence would justify their earlier behavior.
4. The hard evidence at the scene all points to a single male perpetrator with a record of committing crimes, with a simple and a coherent crime theory that fits all the evidence at the scene.
What's vitally important is to recognize that
each of these factors is independent of the others. The status of one is not at all related or dependent on the status of the others. This contrasts with cases that rest on a single assumption (like the Avery case).
This is what I find most interesting about this case, why is it that the PGP don't just believe Knox is guilty, but that the case is somehow overwhelming and watertight? Why can't you see what everyone else sees?