"I have heard Dad talking about him," said George. "He(Lucius Malfoy) was a big supporter of You-Know-Who."
"And when You-Know-Who disappeared," said Fred, craning around to look at Harry, "Lucius Malfoy came back saying he'd never meant any of it. Load of dung - Dad reckons he was right in You-Know-Who's inner circle."
I have no idea what "he'd never meant any of it" means in this context? Is it an idiom? But I can't find it anywhere. Maybe, I don't know what "meant any of it" refers to.
-- Excerpted from Harry Potter.