Fire of Liberty
In the last four years there have been a plethora of books published(see here, here, here, here, and here) which note the ever increasing demise of Europe and the West in general by a massive onslaught of immigrants from Northern Africa, Southern Asia, as well as the Middle East into an established society that does nothing to forestall the fact. While the bevy of the immigrants who settle down in Europe are Muslim and are merely searching for greater opportunities, they fail to shuck off the culture and laws of their old nation and embrace the language, laws, and culture of their new home thus eventually turning the nations of Europe into a reflection of the homeland they left behind. Now if you take into account the fertility rate of these new immigrants and compare it to the almost fertile population of the native born Europeans(multi-generational Europeans or non-Muslim) , it's easy to conclude that the great scholar Bernard Lewis is right when he pointed out in his various books, op/eds, and speeches that the nations of Europe will be mostly Muslim by the end of this century. One can easily understand how a civilization can become extinct or destroy itself from within when its national born citizens are so high on having a welfare state and massive benefits that they will forgo reproducing enough children to foot the bill(as well as carry on their heritage, culture, laws, and language) that they are willing to allow a ton of immigrants, without an aggressive assimilation program, to come in and do the work thus providing the taxes needed to keep the natives in a life of luxury.
To make matters worse, the original inhabitants of these nations are electing politicians or allowing unelected bureaucrats to devise and enact laws that allows the newly arrived immigrants to retain the ways of their old country by allowing Muslim men to have multiple wives, dual-language education, balkanization of the ancient neighborhoods, and in some extremes even advocating the imposition of sharia law(see here and here) over Common(the UK) and Civil(most of Europe) law thus allowing the further erosion of Western Civilization under the guise of "multiculturalism." All of these actions are slowly but surely turning Europe as well as the UK into a decrepit society much like Gibbon described in his masterful work The History of the Decline and Fall of the Roman Empire. One can guess the pleasure that Osama bin Laden and his ilk are having as they watch the cultural suicide of Europe and the reconquest of the Ummah via stealth. People might laugh but demographics is a great predictor of things to come.