Belief in a supreme being is dying in Europe and here in the USA.
The real damage is then allowing Muslims in. They fill the void left by the Judeo/Christian both by the Muslims and those disappointed Christians looking for something to hang their hat on.
However, there is this:
http://www.foxnews.com/world/2017/03/21/muslim-converts-breathe-new-life-into-europe-s-struggling-christian-churches.html