I don't think this man is crazy, or deluded. He's not simply opining - he's clearly been in an excellent position to know and see things pertaining to his claims first hand.
Like Icke, though, he is pushing a personal agenda (and his book! a lot!). But I don't think everything he says is worthy of being dismissed offhand to "tin foil hat" status because of that.
I have no doubt those people who were saying Savile was a pedo and rapist back at the height of his popularity were thought of as crazy, also. Good ol' Uncle Jimmy would NEVER harm a child, and he's done so much for charity! Etc. And look where we are with that now.
The accusations against Heath have been voiced before, and don't seem to be going away. Savile's relationship with Govt. officials --needs-- be scrutinised closely. Who else was preying on institutionalised kids, since Jim found it so very easy to do so, with the blessing of all concerned (except, obviously, the kids).
As for little Madeline.. I just don't know. Nor at this point do I know enough to have an opinion worth typing.