This fact was recently published by the Pew Research Center. The published information was in a report on attitudes of Christians in Western Europe. The report acknowledged that Christianity has lost it's grip on the population. "Western Europe, where Protestant Christianity originated and Catholicism has been based for most of its history, has become one of the world’s most secular regions. Although the vast majority of adults say they were baptized, today many do not describe themselves as Christians. Some say they gradually drifted away from religion, stopped believing in religious teachings, or were alienated by scandals or church positions on social issues."
However, these former Christians harbor attitudes which are significantly different from those who identify as agnostic or atheist. Whereas agnostics and atheists remain open and hospitable toward immigrants and minorities, the ex-Christians exhibit intolerant and negative attitudes. It's a sad fact and one which is karmic, emerging from centuries of Christian intolerance toward people who are not Christian.