[{quoted}](name=Menea Calais,realm=NA,application-id=ZGEFLEUQ,discussion-id=6EXXl7EZ,comment-id=000100000000000000000000,timestamp=2016-04-02T22:20:12.967+0000)
'%%%%%' and '%%%%%%' have been appropriated by black culture since the 1960s as a way to change it into something from its earlier connotation. '%%%%%%' specifically came from the Portuguese and Spanish words derived from 'niger' as '%%%%%%' only became mainstream slurs during the 20th century. Before then, it was negro, you know, that noun that isn't a slur either? No, '%%%%%%' was not created for a racist slur either. It just went into use as one.
'Okie' is closer to what you are asserting. 'Okie' is a geographic slur for a person from Oklahoma, as many Oklahoman fled to California during the Dust Bowl, and like how people don't like shit tons of immigrants to their home today, people didn't like the Oklahoman people coming in. No one used 'okie' as a word before then because no one gave a damn about Oklahoma before then, and the resident Indians from which the name was derived probably used a different name.
Again, you're using a word that had a meaning outside of its insult. Interestingly, it's also a word that is now used almost exclusively in that meaning (I promise you, I hear the word "Okie" used more in self-reference where I'm living in Oklahoma than it's being used as some sort of attempt at an insult elsewhere - I'd literally never heard it before I moved here).
The slur meaning comes from the other meaning - it is in fact premised on the idea that the other meaning is inherently a negative thing. Without that original connotation, there could be no way to view the word itself as insulting.
You're also comparing it to a word that was adapted for the express purpose of dehumanization - not really a valid comparison.
As backwards as it may seem, this is actually wrong. All you need to do is read The Grapes of Wrath, and you can see the evolution of 'okie' in real time. It means nothing. Then it means someone from Oklahoma. Then it's a slur. Why? Because when a group of people are acting hostile to you and they refer to you by a term, you understand that term as an insult. It doesn't matter if it's brand-new or old-hat.
Except that novel completely misses the final (so far) aspect of the evolution of the word - when it loses its insulting meaning entirely, and falls back to the mere descriptive meaning that came before it.
The word itself is irrelevant; what matters is the intent (or perceived intent) from the speaker. This is why the adaptability of the system is very important. If people don't intend to use the word as an insult, they shouldn't be punished as if they were insulting someone (if they're punished for saying something rude, that's a different ball of wax.)
In the words of Louis C.K.: "When a person tells you that you hurt them, you don't get to decide that you didn't." That is to say, your intentions are not as meaningful as the effects of your actions.