I do have a problem with a philosopher, regardless of notoriety, providing critique on a field outside of his expertise. He may be perfectly capable of commenting on the skill with which an argument is made, but nothing on the basis for the argument.
I would also point out another author so honored as a TLS Book of the Year recipient - Barack Obama.
That you personally have a problem with it says little about the validity of the arguments presented in that book.
Hence pointing out Hitler as man of the year is tangential to the issue at hand.
What we would like to know is exactly what is wrong with the BOOK ITSELF. *THAT* is where the focus should be on.