I applaud anyone who has a passion for music. I don't care if it's Classical or Rap, or Musical Theater, or Pop, or Goth Metal - whatever. I love hearing from people about the kind of music that they enjoy, especially if it is a kind of music I've never listened to.
I am not out to convert anyone to my taste in music. Quite to the contrary, I welcome interaction with those people whose taste is diametrically opposite to my own. I want to expand my listening horizons.
So regarding the OP's question: How do we bring back Classical Music for the Average Joe?
My answer is how do we bring ourselves to enjoy the music the Average Joe listens to?