I blame Whitey!
Racism exists in America today. That's a fact.
However, that racism is not blacks oppressing whites and exercising privilege over them. Blacks bitching about whites is of no social or personal consequence to me whatsoever; however, whites bitching about blacks carries societal weight due to actual (system based) racists permeating our power structures.
"A nation can survive its fools, and even the ambitious. But it cannot survive treason from within. An enemy at the gates is less formidable, for he is known and carries his banner openly. But the traitor moves amongst those within the gate freely, his sly whispers rustling through all the alleys, heard in the very halls of government itself. For the traitor appears not a traitor; he speaks in accents familiar to his victims, and he wears their face and their arguments, he appeals to the baseness that lies deep in the hearts of all men. He rots the soul of a nation, he works secretly and unknown in the night to undermine the pillars of the city, he infects the body politic so that it can no longer resist. A murder is less to fear"
Cicero Marcus Tullius
Meanwhile, back on planet earth: Racist - Synonyms and More from the Free Merriam-Webster Dictionary
a person who believes that one race should control all others"
If you hate capitalism so much, then just write everything in lower case. Problem solved.
Trayvon Martin's friend, who was on the phone with him, relayed TM saying that "some creepy ass cracker" was staring at him. That was George Zimmerman. TM said he was going to take a short-cut to the home of his father, with whom he was visiting, and told his friend basically "... that nigger is following me!"
To me, in the entire context of the phone conversation between the two, it seemed common slang terms used without thought by the two of them and probably the friends they hung out with. I didn't see it as racist; just vulgar slang, common among many kids today.