Agree with"欧洲穆斯林化实际上是上世纪50年代到今天，文化同化工作没有做好造成的"and"他们没有对所在国或当地社会的认同感，或认同感很低" based on my travel experiences in Europe. In contrast, the Muslims i've known in US are much better "assimilated", well, unless they were pretending? i don't know, because i don't have very close friends who are muslims. Yet, in the news, Islamic extremists are the major threat to the modern civilization(see below) now. However, i think the ultimate challenge to the development of advanced civilization will not be the extreme Islamism (it'll be gone), something attacks the weakness in human nature and eventually destroy our civilization if we don't have the wisdom to stop it. If extreme Islamism is "Ebola", this is a "cancer", much harder to treat because a cancer is derived from our own body whereas Ebola is a vicious foreign pathogen.
The Deed of Islam ( not updated yet)
The Shoe Bomber was an Islamic extremist terrorist
The Beltway Snipers were Islamic extremists
The Fort Hood Shooter was an Islamic extremist
The underwear Bomber was an Islamic extremist
The U-S.S. Cole Bombers were Islamic extremists
The Madrid Train Bombers were Islamic extremists
The Bafi Nightclub Bombers were Islamic extremists
The London Subway Bombers were Islamic extremists
The Moscow Theatre Attackers were Islamic extremists
The Boston Marathon Bombers were Islamic extremists
The Pan-Am flight #93 Bombers were Islamic extremists
The Air France Entebbe Hijackers were Islamic extremists
The Iranian Embassy Takeover, was by Islamic extremists
The Beirut U.S. Embassy bombers were Islamic extremists
The Libyan U.S. Embassy Attack was by Islamic extremists
The Buenos Aires Suicide Bombers were Islamic extremists
The Israeli Olympic Team Attackers were Islamic extremists
The Kenyan U.S, Embassy Bombers were Islamic extremists
The Saudi, Khobar Towers Bombers were Islamic extremists
The Beirut Marine Barracks bombers were Islamic extremists
The Besian Russian School Attackers were Islamic extremists
The first World Trade Center Bombers were Islamic extremists
The Bombay & Mumbai India Attackers were Islamic extremists
The Achille Lauro Cruise Ship Hijackers were Islamic extremists
The September 11th 2001 Airline Hijackers were Islamic extremists
The Kenyan Mall Massacre was done by Islamic extremists
Boko Haran are Islamic extremists
The kidnapping of an entire girls school and selling them into slavery in Nigeria was the work of Islamic extremists
The burning of a village full of 2000 people in Nigeria most of them alive was the work of Islamic extremists
The no-go zones being established in the west are allowed to be established by Islamic extremists
The Charlie Hebdo Magazine Massacre was carried out by Islamic extremists
The Pakistani school massacre of over 100 children was carried out by Islamic extremists
The men who shot little girls on a school bus in Afghanistan because they wanted an education were Islamic extremists.
The people demanding a separate government in the Philippines are Islamic extremists
Since the year 2000 over 40 bombings have been carried out in the Philippines by Islamic extremists
The Oklahoma City workplace beheading was done by an Islamic Extremist
The Fort Hood shooting was carried out by Islamic extremists
The NYC cop Ax attacker was an Islamic extremist
The Canadian Parliament attack was carried out by an Islamic extremist.
The France was attacked by Islamic extremist
The Chattanooga attack by Islamic extremist .
The Oklahoma beheading tried converting co-workers to Islam.
The San Bernardino murders.
thank you for sharing your observations and opinions. I second what you said, in addition, Islam is different from other religions, it is also a political system. Muslim supremacy is the center of its doctrine. To Muslim, the world is divided into house of peace (Muslim countries) and house of war (kafir countries). They are told that kafur are filthy pigs, cant be taken as friends. this is the reason that they will never integrated with kafir unless they abandon the Islamic ideology. their goal is to establish worldwide caliph, covert everyone to muslim by force if necessary. that's why its violent.