This does signal what type of person you are dealing with if they don't go along with the word change. For example, if I heard someone using the negro word I would think that there was an excellent chance that person was racist. The renaming also signals to everyone racism isn't acceptable (in a very minor way). It is hard to change a culture but the words we use in one of the ways we do it.
When the world stops being racist this renaming will stop.
When the world stops being racist this renaming will stop.