What's wrong with old music?

At school I am constantly getting mad fun of for my music tastes. I like bands like the Rolling Stones, The Who, Jimi Hendrix, Bob Dylan, U2, Genesis, The Beatles, The Doors, Tom Petty & The Heartbreakers, etc. People in my school don't know who the Rolling Stones are! I'm getting made fun of because no one knows the bands (except the Beatles). People instantly judge my bands. I tell them that I like music from the 60s, 70s, and 80s. They go, "EWWW! They are OLD!" When I asked them what music they liked, they started listing all these rappers and hip hop bands. I overheard a conversation where a girl said, "Wow, that song's 5 months old! It's ANCIENT!!" They listen to month old songs that eventually disappear and I listen to music that is about 40 years old that still plays on the radio. The music my friends listen obviously talk about drugs, and violence. At least some of my music actually hides it rather than it being obvious. I keep on asking them, "What's wrong with old music?"