Rammstein's lyrics have a double meaning. Said aloud, 'du hahst' could mean 'you hate,' (Du haßt) but it could also be 'you have,' which is what the official lyrics say, and which is what makes sense with 'du hast mich gefragt,' -> 'you have asked me.'
Du hast keine Idee. (You have no idea.)
Du haßt Hunds. (You hate dogs.)
Short/Slang of 'Knackers' / 'Scumbags' used in Ireland to define sketchy characters, who'll steal you clothes, money, and other possessions you have on you when walking through the cities of Dublin or Limerick.
Wear tracksuits, travel in numbers, and cary knives.