Go to North you can find Kerala Samajams, tamil or telugu associations, go to south you may find a Bengali or Gujarati or a Oriya association. Karnataka is perhaps the only state you find Kannada Sanghas. Why these people have this feature? Probably out of a feeling of insecurity in their own state or due to an inherent character of Inferiority complex. Their Kannada fanatic leaders seems to be doing worse by raging passions and crucifying them further in to depths of Inferiority complex.