He was a very talented guy, but sometime around the mid '80s (maybe even before) he started to go insane and his family just let it happen. He mutilated himself with plastic surgery, but was never honest enough to admit it. He lived in a giant bloody children's playground. He married a random woman just so she could carry "his" children.
As for the paedo stuff... :( He may, in his mind, have just wanted to find the childhood he never had, but he was a grown man and I believe he was sexually attracted to those little boys, even if he couldn't even recognise it or admit it to himself. Those parents who let their kids stay with him were at best misguided opportunists.... at worst criminally negligent.
It actually used to make me angry, seeing him shuffling around like the Phantom of the Opera, caked in makeup with his plasticine nose, glued on facial hair, that silly wig on his head and a scarf over his face. The papers poked fun but still essentially turned a blind eye to the fact that the guy was COMPLETELY BARKING MAD. If he wasn't a celebrity, he'd have been locked up for his own protection. His family and his lackeys should be ashamed that they did nothing to stop him ending up that way.