Treated unfair, or hypocrisy?

So today on the bus a little girl called Ryan over to give him some candy. Ryan got up, and Corbin started calling him names. (this wasn't just a small, "fatass" this was full out constant picking at).

Well, Ryan got a little angry. He got in Corbin's face about it. He said, "If you don't like being called the N word, don't call other people names," calling out his hypocrisy.

I think I could defend this statement. Honestly, Corbin does get picked on for being black, and we take care of it. He can't honestly expect not to get treated like an ignorant nine year old when he acts like one.
and this is not exaggerated, "fatass! You're so fat," and "sit down fat ass!" came out of his mouth today towards Ryan.

Of course, mom was defending her little angel, as usual. "He can't help his race, but you can help your weight," she told Ryan. Um? That makes Corbin in the right? I don't think so.

I went to talk to her about it, because Corbin was definitely being defended and Ryan treated unfairly. I said I was "getting tired of Corbin's snotty attitude." She knew what I was talking about and started pointing out my flaws. I could've seen that coming. I go to talk to her about one of her snots in any type of bad way at all, and she latches onto something about me. She tried defending that little brat.

At least my dad agreed with me. I'm so tired of her bullshit. She won't even listen to me when I have a problem. Great parenting skills, right?