Because they're both music I guess.
lol
Look, before I even got to exprience or even listen to metal overall, rap was all there was, or so I thought at that time. I even heard "screamo" rap, and I don't mean nu-metal, the sad excuse of a metal sub-genre.
I do not consider rap or hip hop, whatever you want to call it, actual
beautiful music. I have learned that it requires little to no talent at all. Do you even look at how simplistic and typical the lyrics are? I fail to see how rap is music. The only material required is a recording studio, DJ, and some "special stuff" in order to mix the stuff up. People can mix it however much they want, and guess what? The mainstream eats it up like a bunch of clowns. Why? Because the companies put those rap groups out there, not caring for their talent, as long as they get their stupid money. I know it is NOT about making music, no matter how close to "political" or "realistic" it gets. Sadly, it is just for the money.
Never EVER dare to compare both. God, you are insulting a great genre of music.
Wait a minute, I shouldn't be saying this to you, this should be said to the guy who created the stupid mash-up. Jesus, people like that. Still, 50 Cent is nowhere near as what Opeth is. Two different genres, two different sounds.