https://www.ibtimes.co.uk/natalie-rupnow-pictured-wearing-same-kmfdm-shirt-columbine-shooter-coincidence-copy-cat-1729601
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KMFDM is a German industrial band formed in 1984, known for their aggressive, genre-blending sound that combines heavy metal, electronic music, and punk influences.
The name KMFDM stands for "Kein Mehrheit Für Die Mitleid," which translates to "No Pity for the Majority."