no it doesnt mean that they should be rude to us …some people just do not know how to communicate properly and may outwardly appear rude when in fact that was not their intention…like in the example of my uncle. This is just the way he talks. I dont expect others that do not know him to put up with it tho.
you are dil ka acha insaan and it shows by the way you communicate with others. Not everyone knows how to express themselves properly …the way you do.
AND no you can not be rude to me 
BUT if you were rude to me at any given point…I would ignore it because I will assume you were having a bad day. 