For the other statements, I dont think he's "endorsing" it, he's raising questions. I'm not AT ALL on the same boat as him wrt this topic, but I dont mind a discussion on this topic. I consider that the basis of democracy.
Also, from this recent interview on the register it shows he changed his mind on this topic: "Many years ago I posted that I could not see anything wrong about sex between an adult and a child, if the child accepted it. Through personal conversations in recent years, I've learned to understand how sex with a child can harm per psychologically. This changed my mind about the matter: I think adults should not do that. I am grateful for the conversations that enabled me to understand why."
But when a 66 year old man says that he has now learned that sex with children is wrong, do you just wipe the past clean and forget that anything ever happened? Would it be wrong for those past views to have any effect, now that he's changed his mind?
There is a comment of his talking about "voluntary pedophilia." This is likely (very likely) a misuse of terms, though -- having had this discussion with others on the Internet, they do not usually intend pedophilia, which is an attraction to the prepubescent. Prepubescent children have no sex drive and their interest in sex is usually taken to be a sign of sexual abuse. Consequently it is hard to see voluntary pedophilia as something that can happen.
He probably means hebephilia (11-14) or ephebophilia (14-19). In some countries (Italy, Germany) or cultures the age of consent is as low as 14. Some are perhaps lower. The strict liability concerning statutory rape may also be different, which is likely what he wanted to bring into question.
There are currently people serving sentences for sexual crimes they "committed" after being lied to by their partner.
I don’t know the guy but that’s a big accusation.