Cultures based on atheism or worship of the state enjoy witty repartee at parties, but things don't last. Citizens go about life worshipping themselves, humanity, art, love, dictators, their children, and politicians. 500 million gods for 500 million people. Meanwhile, the Moslem migrants go about life with a more unifying world view, rejecting the nihilism of their host culture.
Christianity and classicism cannot be found in postmodern secular Europe.
But fear not!
Islam has come to Europe.