I'm unable to blame any bad economical macro performance to anything but bad economic policies unless in the context of major and lasting cataclysms. No bad moral lasts in a context that rewards good morals economically, and vice-versa. Morals are never a driver, but a consequence of the context. Even today islam hasn't caused, and is ages from being able to cause, as much damage to Europe as Europe has inflicted to itself, by itself entirely. It's never a matter of conservatives vs liberals nor christians vs islamists, but solely about libertarianism vs socialism, i.e, freedom vs fascism.