v_e; //I may be missing something; can you explain more fully what you mean by "spiritual community" and "shared sacredness", please, Khandro?//
As that most brilliant of human beings Trevor Legget once pointed out to us at the Buddhist Society, London, If you search for the root of the word 'religion' you find that the 'lig' part is synonymous with the 'lig' component found in such words as ligature and ligament i.e. to tie, to connect to, or bind together.
All religions contain THREE fundamental elements; 'The teacher(s)' Buddha, Christ, Lao-tzu etc.) 'The Teaching' (The dharma, the scriptures etc.) and the 'Spiritual Community' - The sangha, monastic brotherhood, the congregation, and any form of shared experience of the sacred, and what Scruton refers to in my above quote.
All three It seems to me the atheist, being without any religion, is denied.