I usually don't disagree with you, but ''greatest white rapper?'' MAJORITY of black and white rapper today say Eminem's easily top 3 if not the greatest. Look at his accolades, he's sold the most albums ever for a rap artist. Even Rakim in an interview says Eminem's great. And people saying Nas is better, Nas COULD HAVE been better. He fell off, plain and simple. No one's ever had the consistency like Eminem.

If we measure "greatness" by how many albums sold and accolades, then Eminem is definitely the greatest rapper of all time. Me saying he's the greatest white rapper is not to say he's not great, regardless of his race. I think its easy for anyone who knows anything about rap to see that Eminem is a very skilled emcee.
But the thing about rap music is it has a MAJORITY white audience. Everyone listens to rap, but when you look at who's spending money towards buying the albums and concert tickets, its predominantly white people. And if you think that dynamic has nothing to do with Eminem's rise to prominence, you have totally erred because even he himself and other rappers like Macklemore have admitted that.
it is what it is. I think Eminem is great, I just don't think he's the greatest of all time. I can think of a few people who I'd rather listen to their discographies from front to back more than Eminem even if they haven't scored the accolades and whatnot.