This article aims to move beyond media discourse about "new atheism" by mapping and explaining anti-religious zeal among the public at large in 14 Western European countries. We analyze data from the International Social Survey Program, Religion III, 2008, to test two theories about how country-level religiousness affects anti-religiosity and its social bases: a theory of rationalization and a theory of deprivatization of disbelief. Hypotheses derived from the former are contradicted, whereas those derived from the latter are largely confirmed. Anti-religiosity is strongest among disbelievers and among the higher educated in the most religious countries and among the older generations in today's most secularized countries.