@bam52468,
No! When you call a black person a "nigger," you're insulting them based on the color of their skin, which is inherently unfair because it has nothing to do with a person's intelligence, capabilities, or behavior. On the other hand, you're being insulted expressly BECAUSE of your bad behavior. DO YOU GET THAT?
If it's hurtful, you brought it on yourself. Your mother would have had no reason to say those things if you hadn't given her one. Apparently you think other people have no right to react to your bad behavior. That is a BIG mistake. The world doesn't work that way.
So...you think you DO have the right to misbehave because your brother made you mad, but your mother DOESN'T have the right to call you on it because you made her mad? Better rethink that one.
Here's another lesson you need to learn from this: If you don't want your mother to embarrass you in public, don't embarrass HER in public. Any parent would be deeply embarrassed to have an almost-16 year old behaving the way you did. You should be ashamed of yourself! Instead, you're blaming your brother and your mother. That is very childish.
If you want to be respected and treated like a 16 year old, you're gonna hafta step up your game. Either that, or get used to being treated like a baby.