"*When people say I hate rap you know what they are really saying.*"

....That they hate rap?

"*Yet their kids are running around sagging*"

Trust me: if they're sagging, then they're not "running around" anywhere.

"*Don’t hate! White America invented rap-Dr. Seuss,*"

In the first place, I dare you to declare to a black man that "whites invented rap."  In the second place, rhyming and poetry are not the same thing as rap.

"*...and invented sagging-plumbers."

Um- no. Sagging was invented in jails by black men.  I'll let you Google it to find out the rest of the sordid details.