Washington (CNN) The top U.S. commander for the fight against ISIS on Monday slammed the idea of "carpet bombing" the terror group. Army Lt. Gen. Sean MacFarland, who directs the coalition fighting ISIS in Iraq and Syria, provided the most detailed military criticism to date about the concept and detailed why it's militarily unacceptable. "Indiscriminate bombing where we don't care if we are killing innocents or combatants is just inconsistent with our values," he said in response to a question from CNN on the possibility of using carpet bombing. Though MacFarland didn't mention any political candidates by name in his answer, Republican Sen. Ted Cruz of Texas while on the campaign trail has called for employing the practice against ISIS.