Peil,
I am sorry for the way I have spoken to you.
I sincerely hope that what I have said bears no resemblance to the person you are.
You must understand though, for centuries this is the way Black people were spoken to by their White bosses.
<s>"How does it feel when I call you what you really are</s> You're just a nigger- a worthless piece of shit and a true disgrace to the human race.
You'd best just keep your fucking mouth shut, if you knew what was good for you nigger, as you don't even have anything worth saying.
<s>How's that feel</s> You hear me, boy?"
This is the way many American's fathers, grandfathers, great great grandfathers spoke to Black people, simply due to their race.
On the other hand, for centuries when the Black man referred to the White man as cracker, it was usually said out of fear, such as this:
"Betta watch out- here come the cracker man! He be crackin his whip."
So you can therefor hopefully see, one word can be much more destructive than the other, depending on its use.
The reason you didn't realize the difference, is likely due to your ignorance.