What you are exp is a very common thing.People's tendency is to cluster with similar beings.In US you have all andhras under one roof whereas here there may be some infighting. Just as choosing a Hindu dominant locality was a secondary choice(not a true choice but a forced one),so do these society's.Meet them during lean period and they would welcome you with open arms.Thats Business. Plz keep it out from all of us who truly dont have any illwill and hope the same