> Religious people commit less crime, get and stay married more, use less illegal drugs, donate and volunteer more... It would make more sense to fear people becoming less religious.

Citation please.

"A 2001 review of studies on this topic found "The existing evidence surrounding the effect of religion on crime is varied, contested, and inconclusive, and currently no persuasive answer exists as to the empirical relationship between religion and crime." - http://en.wikipedia.org/wiki/Morality_and_religion

The Nordic countries regularly feature at the top of the 'Best places to live' and 'most atheistic countries' lists. Correlation doesn't imply causation, but that should be enough to at least question your assertion.