He didn't try to make it a very angry song.  He was just adressing his haters in a funny way, such as here: 
 
"Will's a nice guy 
why he's so nice I'd 
let him date my daughter 
like he was a white guy" 
 
"Pepole dissing Will sat on a wall 
People dissing Will had a great fall 
All the king's horses and all the king's men 
Couldn't put none of their careers together again" 
 
  
 :hilarious:  :hilarious: