Re: Sikhs express shock after shootings at Wisconsin temple
domestic terrorism - terrorism practiced in your own country against your own people; "the 1995 bombing of a federal building in Oklahoma City was an instance of domestic terrorism"
act of terrorism, terrorism, terrorist act - the calculated use of violence (or the threat of violence) against civilians in order to attain goals that are political or religious or ideological in nature; this is done through intimidation or coercion or instilling fear
Can you not see how the Sikh shooting could fit this definition while the Batman shooting could not?
All generalizations are dangerous.