Why do african americans feel angry when somebody calls them ''nigger''? Is there anything wrong with being a black person? No.Then why he is feeling humiliation when some one call him a member of low caste ?
Do you love if I call you "Bhangi ki aulaad" ? NO
If every one is equal than why not ?
Because it is being used derisively. Because the caller is implying that there is something to be ashamed of, which is why it is being used as a demeaning swear word.
Same thing here. When 'low caste' is used as an insult, there is an implicit assumption that being from a low caste is itself something bad. When somebody calls a black person a 'nigger', he is saying ''you are black, and I despise you for that.''
Similiarly when somebody calls you a low caste as an insult, he is saying that he considers you lower than him, unworthier than him. That is why it is offensive to call somebody low caste as a derogatory term. If somebody mentions matter of factly that you are from a certain so called lower caste, that will not be offensive. Offence is taken only when offence is intended.