what gave Public Enemy the "right" to throw these insults towards these popular American icons?

Fight The Power (Def Jam Records 1989), despite being described as Public Enemy's "most perfect 12" record", was perhaps also their most controversial. In the song, Chuck D refers to Elvis Presley as a racist, and partner Flava Flav ads "insult to injury" with his follow-up insults both to Elvis and to American movie star icon John Wayne when he toasts, "mother f%$@* him and John Wayne"! Assignment #1 asks you -- what gave Public Enemy the "right" to throw these insults towards these popular American icons?

Three pages double spaced

*no photograpy other than on the front page, references expected 

(The question is what it bolded in black) 

 i need this done by 10:00 am