Just to go more into details on why people don't like him (and since you asked), here is an Amazon reviewer of his book:
"The author repeatedly reminds readers that he is well traveled, is a "voracious" reader, pursues his exercise routines "assiduously", and is from upper class Mediterranean roots. Further, at some points in the book, he writes from a bitterness and contempt (which he admits) for journalists, economics, others in his profession, and generally those who are not "literate persons"."
And this was a 3 stars review... Now here is a 1 star review:
"This author should be named Narcisist, not Nassim. The rest of the book is devoted to propping himself up in his own version of an occupational caste system, where he is on some higher plain because he fancies himself to be some sort of quant jock who knows basic statistics and probabilities. In the meantime, he manages to insult MBAs, academics, specific authors, people who live provident lifestyles, successful but "non-quant" traders, scientists (those with poor social and hygene skills), dentists, and on and on. Pompus, self-serving, and hollow."
I hope that answered your question...