I should be less abrupt. For that abruptness, I apologise. However, I think that you might want to consider the effects of the decisions you make and the size

I should be less abrupt. For that abruptness, I apologise. However, I think that you might want to consider the effects of the decisions you make and the size of your generalisations. You have a problem with a particular application of a particular example in a particular chapter of a book, on a technique you don't fully understand, and provide wider comments that explicitly undermine the whole book, that may well dissuade people who could benefit from reading it.