After an argument with her father, Paige left the house to go stay with a man more than three times her age. It's likely she knew of the man's neo-Nazi views - he wasn't exactly quiet about them. Whether she knew he was part of the English Defence League and the British National Party, we don't know. Pictures in his flat make it clear she would have noticed he was a pedophile, of course.
What she did not know was that he had already begun planning what he would do if she showed up on his doorstep... and that his plans were worse than pedophilia.
The neo-Nazi was caught when the assistant he'd invited over to dispose of (and have sex with) the corpse was overheard telling someone else about it.