Bullshit.
He heard the word, and (rightfully) pointed the person out.
Was he supposed to calmly and slowly figure out the details of this person before coming to the conclusion it was a racial slur? And if he did do that, is he then to conclude that because it was a 13yo girl, it was ok?
Look I have my problems with Goodes, but those taking the 'it's ok to boo him because of his reaction to a racial slander'.... yeah, you're racist.