bloody-minded

  1. adjective
    marked by eagerness to resort to violence and bloodshed; "bloody-minded tyrants"; "bloodthirsty yells"; "went after the collaborators with a sanguinary fury that drenched the land with blood"-G.W.Johnson
  2. adjective
    stubbornly obstructive and unwilling to cooperate; "unions...have never been as bloody-minded about demarcation as the shipbuilders"- Spectator