"They're burning all the witches" is a lyric from the song "Heathens" by Twenty One Pilots. The song was released in 2016 and became a hit, reaching the Top 5 on the Billboard Hot 100 chart. The lyric speaks to the fear and prejudice that can lead to persecution, even for those who are innocent. The song's haunting melody and introspective lyrics reflect the band's signature style and have resonated with fans across the world.