Ingraham’s remark to Lebron James, shut up and dribble, is a play on the title of her book about the 3 white Dixie Chicks called Shut Up and Sing.
She was suggesting that the singers sing, and she’s saying the basketball player should dribble, because their opinions get in the way of the entertainment, which is what they are paid for.
Ingraham did not impugn Jame’s intellect. She didn’t, but I will. James is a moron.