Here, let me paraphrase what happened.
Chuck D of Public Enemy: Yes, Bernie Sanders campaign peeps, Public Enemy will perform at your rally.
Sanders peeps: Neat. Hey public, Public Enemy is fighting the power with us. Woo!
Flava Flav: Nu-uh! I am not! You stop using Public Enemy right now! Here’s a cease and desist letter from my lawyer!
Public Enemy to Flava Flav: Bye Felicia.
How this could have been avoided:
IF Chuck D knew Flava Flav did not wish to be part of this, the campaign maybe could have used Chuck D of Public Enemy…or, you know, Flava Flav mighta coulda just shhhh…and let it go. And, you know, conveniently been busy with another engagement? ¯\_(ツ)_/¯