*Snipped*. <modsnip>. Pointing out to what the facts are and what the rumors are has nothing to do with any downplaying. The attempts to make RG look like a serial killer go all the way back to when the defense still was trying their lone wolf scenario. That is the only reason why all these rumors have popped up. Most of them originate from the defense themselves.
The truth is that if you look at the facts then you see nothing where you could foresee that any of these 3 would become murders. I don't read much into the rock throwing party of AK, or manga collection of RS either. And indeed I don't see any aggressive rapist murder in RG just because he stole some stuff. He even returned some of the stolen stuff. Where is the aggression?
IMO none of these 3 would ever by themselves murderer anyone. This is where the group dynamic comes into play which is a very interesting discussion <modsnip>.
I appreciate your fairness in discounting the histories of the defendants. I think RG's background is far more serious than AK's or RS', but you are certainly right there's nothing in his known history that screams rapist or murderer.
But in leaping to the "group dynamic" as an alternative explanation, you point out the problem with the pro-guilty stance. There is more evidence of RG's criminal background than there is of a criminal "group dynamic" between AK, RS and RG. There is simply no evidence the three ever met as a group, much less formed a psychological bond so dysfunctional it ended in murder. And there isn't enough time for them to have done so on the night of the murder.
You might as well blame satanism, as Mignini has already tried.