Is Europe inevitably secular?

"I was pretty certain that Europe was doomed to a future of secularisation and shrinkage (which, so far, have gone together) taking the children of Muslim immigrants down with it," writes Carolyn Moynihan at Mercatornet. "I imagined London, Paris and Berlin would eventually be inhabited by small populations of Richard Dawkins clones and Optimum Population Trust faithful.
"But on the way to Spain (Catholic country, lots of immigrants, total fertility rate 1.3 children per woman) I got to read a conference paper that shot holes in that notion. Eric Kaufmann, a Reader in Politics and Sociology at Birkbeck, University of London, reckons that the secularisation trend in Europe is slowing down and by 2050 the continent will begin to become more religious, thanks to various factors, not the least of which is current Muslim immigration. Second generation European Muslims are tending to hang onto their religion as a matter of political identity, says Kaufmann (who has a book on the subject coming out this week) and will not follow the secularisation pattern of native Europeans or Christian immigrant groups."