The back faces of cards with disturb have an ability that exiles them instead if they would be put into a graveyard from anywhere
A commonly played answer, such as Spite // Malice that couldn't take out Black dorks wouldn't work anyway, Slay was commonly seen in sideboards as it was a free card with those cantrip fun times, and Spiritmonger could become White or Red if you needed it to
Targeting multiple opponents, permanents, spells, abilities, and/or cards with the same spell or ability doesnt constitute committing multiple crimes
Weve seen similar effects on cards like Triumph of Ferocity or Colossal Majesty, but getting two cards is a significant upgrade
This results in the black colored back stamps we see
I believe counterspells in Commander need to do more than just counter spells