The label of Catholic terror was never used about the IRA
Fundamentalism is often a form of nationalism in religious disguise
Last year I attended a conference in the US about security and intelligence in the so-called war on terror and was astonished to hear one of the more belligerent participants, who as far as I could tell had nothing but contempt for religion, strongly argue that as a purely practical expedient, politicians and the media must stop referring to "Muslim terrorism". It was obvious, he said, that the atrocities had nothing to do with Islam, and to suggest otherwise was not merely inaccurate but dangerously counterproductive.