This type of application of self-defense gun law isn't controversial at all, many states have castle doctrine self defense (which is like one peg down the meter from SYG) and have resulted in probably... hundreds of minorities being shot by whites and no story. I don't know if you remember but in Texas there was a story about a homeowner who saw 2 guys robbing the house next door, he calls 911, they say they are coming, he's still on the line with them. He tells the 911 operator "well, you're not here yet, and they are coming out. I can't let them get away. I gotta go take care of this. *loads shotgun*" He hangs up and goes and shoots and kills both of them as they exit the house. They were 18-19 year old minorities, don't remember if black or hispanic.
Guy was not arrested, charged, or handled in any way.
No controversy. Why do we give a fuck about Trayvon Martin? Other than media hype for no good reason?
And really, if we follow the evidence, is there absolutely anything controversial about applying self-defense in the Zimmerman case anyway? If you believe the actual evidence in the case and don't just take wild guesses at what happened, Trayvon attacked him and continued attacking for some period of time until he was shot. This isn't a controversial application of self defense at all.