Cantonese not as "pure" Chinese as Hakka?

[Al Chu <alchu@i1.net>]

Dear Dr. Liu:

In your last post about Hakka Munti, in the last paragraph you said:

' For us, Cantonese speakers are also "natives" aand not as "pure" Chinese
as Hakka. '

Can you explain to us  how do you get that conclusion. Is that the
conception of Hakka in 
Hongkong or Kuangtung? I did not get that kind of feeling when I read Lo
Hionglin's book 
on the origin of Hakka.  In his book, he had pages on the topics of
Cantonese conception of  Hakka as "barbarian".
Can you discuss this issue more?
thanks
Jen-yih (Albert) Chu