You seem under the assumption that all pedophiles act on their urges and harm children. I'm not saying none of them do, but there are many such people who either restrict their interests to imagery (which is still supporting a despicable system), or who refuse to satisfy their urges whatsoever.
I've spoken to someone who falls into the latter category. He was sexually attracted to children, yes, but didn't permit himself to be anywhere near them nor did he indulge in third party abuse (kiddie porn). He saw a therapist regularly to help him understand himself.
I'm not excusing the behaviour by any means, but there are people out there "afflicted" with pedophilia who understand the harm their sexual preference can have on children, and who (however creepy it is) love children too much to indulge themselves and bring harm to them.
I don't necessarily think we should lose sight of the fact that these are people. They need help, and monitoring. Every precaution should be taken to protect children, but that doesn't end with dehumanizing people.
That said, I am supportive of chemical castration. I don't consider it dehumanizing, because I think that most people should be chemically castrated anyhow.
