This month, I flew to Washington, D.C., rented a car and found myself out in the extremely beautiful and very rural area of Virginia where the Castleton Music Festival is located.The Castleton Festival takes place each summer on a picturesque 650-acre farm, surrounded by gorgeous rolling hills, the Shenandoah National Park and the Blue Ridge Mountains.I was there to attend the world premiere of the one-act comic opera “Scalia/Ginsburg.”The opera is based on the opinions and dissents of two vocal Supreme Court …