I think that Stephen Batchelor's approach is genuine and knowledgeable, not really disrespectful, but somehow opinionated.
scepticism is the leading motive here and this label tends to sell books these days.
The thing that I don't like about Batchelor's book is its revisionism and latent protestantism.
He recounts innumerable little facts about Buddhism, some of them quite misrepresented
With his supposed "peeling away of dogma" from Buddhism, he peels away good chunks of flesh, apparently quite unaware of doing so.
It goes a little bit into the direction of Protestant Buddhism