The revolt was launched by Kvaternik , who was not a Serb hater as his political comrade StarÄ eviÄ . Kvaternik had become convinced that a political solution , as StarÄ eviÄ called for , was not possible . The revolt was launched by Kvaternik , who was not a Serb hater as StarÄ eviÄ was and who had become convinced that a political solution of the type StarÄ eviÄ called for was not possible .