First of all i feel very sorry for what happened to you in train at Patna station, but do u think its too general , there in Bihar. exceptions are always there. Dont just create a negative impact on your mind, as the case can happen anywhere in the world. And yes regarding your friend who feel shame to accept himself as a bihari, its not shame, the root are always there no matter how big the tree became, and ther would not be any tree without root... Try to face the world, we accept we are not developed as a state, but people like your friend is more or less also responsible for the same.