You may be confusing excitement with anger...this whole story smells as fishy as Chinatown to me.
He admits to killing the litttle girl, but won't comment on porn found on his computer? And he's an expert on other child sex abuse cases like that of Polly Klass? That's just too weird.
This guy is obviously a child predator, but my guess is that he did his thing in Thailand and got caught. Now he's in a world of hurt because in Southeast Asia they don't coddle criminals like him nor do they care about fair trials. Anybody remember "Midnight Express"?
This asshole wants to be extradited to the US where we'll treat him with kid gloves and cater to his attention getting addiction. If we take this guy back, we're suckers.
If he does get back to the US to serve time, I hope he ends up in general population. What goes around comes around...