“Is it terrorism when a gunman sprays bullets in an elementary school or an African-American church or a Planned Parenthood clinic? What about at an office holiday party? Does an attack on a military recruitment center automatically qualify? What if a suspect is an American Muslim? Does he or she have ties to designated terrorist groups or are assumptions being made based on religion, even without firm evidence?”
http://www.nytimes.com/2015/12/04/us/terrorism-debate-san-bernardino-shooting.html