Seriously, why is it that when minorities are involved in random acts of violence, it's because their "culture" legitimizes violence; however, when a white man shoots his own family execution style, no one ever says anything like "his culture legitimizes violence"?

He didn't even mention black people or black culture, he was probably referring to gangbanger culture. But because you asked, statistically the latter is much less likely to happen than gangbangers killing eachother left and right. Black culture as a whole does not promote violence, but a large (and growing) subset of the black community, namely gangsters, do. Gangs and gang activity has been on a continuous rise for the last few decades. Sure you've got all kinds of different races in on it, but young blacks are one of the more likely crowd (aside Hispanics/Latinos, but you've made this about black people). To a degree, I feel like American culture in general trivializes violence with video games and movies. However, I don't see those causing issues, no matter what color your skin. Some of the kindest and gentlest black people I've known are way into video games like the ones you mentioned. To me, that just says that they were out of the influence of gangster culture.

Then you gave us this random antidote about how you listened to 97.9 for a couple of songs and came to the realization as why anyone who listens to hip hop music thinks real life violence is cool. Do you think video games like Halo, Counter-Strike, or Call of Duty make gamers believe that real life violence is cool? Do you think the people who watched Breaking Bad or violent movies make the viewers believe that real life violence is cool?

While the anecdotal evidence may have been tongue-in-cheek, the point does stand. Hip hop and rap are often about violence, killing, guns, etc. - especially so for genres like gangster rap. I also don't believe your comparison to TV and games to be fair. Music is something that comes from the soul, something that we as humans often relate to more than any other media. When you're brought up relating music about the ghetto and the gangbangers that fill it, it's much more influential than a video game or a show. Music delivers a message, and the message some rap sends is "be violent", tough, hard, be a playa, be this do that. And I'm not saying that it's the main cause for the violence, but it's a big part of that culture. It reinforces the violence and is therefore an issue.