Ignorance is a lack of knowledge on a subject. You're using the wrong word. Maybe if you payed attention in school instead of thinking of how cool you look in your in your new Tripp pants and snazzy Slipknot shirt, you'd know that.
You're right though, this country has gotten bad. I can't believe anyone accepts Slipknot as music. Those people are so ignorant, they don't know what actual music is.
See, that's how you use the word "ignorant."