Murphy notes correctly that apriorists' and dualists derision of positivist methodology does not equal "Hating Math".
Only a person with a complete misunderstanding about the nature of mathematics could come to such a conclusion; mathematics is on paper aprioristic, while in practice dualist. The statisticians lean more towards positivism, but must still rest upon the apriori axiomatic structure of logic, lest error creep in.
This positivist viewpoint is quite common with those who only took 'applied' mathematics, and have never written a proof in their life. Which is not surprising coming from an econometrician.