It is time to stop the mealy-mouthed euphemisms: 'Nationalists', 'Loyalists', 'Communities', 'Ethnic Groups', 'Cultures', 'Civilizations'. Religions is the word you need. Religions is the word you are struggling hypocritially to avoid.
A Devil's Chaplain (ed. Houghton Mifflin Harcourt, 2004) - ISBN: 9780547416526