Ok you're definitely joking. But just in case you're not....

You must be listening to the radio and even then you're still generalizing as either you are simply missing, or purposely ignoring, lyrics by major rappers which look down on gangs and violence.

Do I believe all country music is about trucks and beer? No, but most of the radio country is.

Do I believe all pop is about high school love? No, but that's what most radio pop is all about.

If some of them talk about gangs it's because that was a normal thing where they grew up, and nobody gets to choose where they pop out of a vagina, or what color. I'm assuming you got quite lucky comparatively. Regardless, there are many main stream rappers with the goal of uniting people and ending violence, mostly because they've seen it on a much more vivid and real level than suburbia.

And on the N-word, who cares if they're the only ones that get to use it? Do you honestly feel left out because you can't use one word characterized as slang at best, and as a derivation of slavery at worst? Do you honestly care if you can't use it? My all white people are supremacists and not all black people say the N word... and not all rappers are glorified gangbangers. Many black leaders actually look down on the word and see it as self-oppression. They don't want to use it, but you're mad you can't?

Here's a good tip for the future. If you're about to say, "All [insert large group of people] are [insert stereotype]." You're probably about to be a generalizing hypocrite. I know I don't like when people say all engineers are nerds, all men are assholes, or all gamers are deadbeats. I don't like when people say all white people are privileged and ignorant so I won't be a hypocrite and say all black people are [whatever].