But the nucleus of religious extremism present in eastern Libya    since the 1990s, increasing levels of internet literacy among    Libya's youth and the consistent failure of successive    administrations to provide jobs, growth and security have all    meant that the uptake of Islamic State-inspired dogma may well    have been an ultimate inevitability.  
    Sanitation workers clean the debris from the    entrance of Tripoli's central Corinthia Hotel (AFP/Getty    Images)  
    That it hasn't shown itself before is only down to the nature    of the Tripolitanian, who abhors the extremist lifestyle,    preferring instead to don the latest fashion, order cappuccini,    and admire the sea view.  
    Perhaps unsurprisingly therefore, at least some of the five men    who drove their weapons-laden car into the Corinthia's car park    at 9.30 on Tuesday morning were not Libyan  a Tunisian and a    Sudanese among them. But Libya has not been invaded by IS    elements from outside.  
    The young men who attacked the Corinthia hotel were undoubtedly    IS-inspired, but they did not sweep into Libya on the back of    Toyotas wearing balaclavas, like their counterparts in northern    Iraq. Several North African nationalities have diasporas in    Libya and these communities' youth are just as unemployed and    disillusioned as Libyans their age, with the added dejection of    being foreigners in a country they likely grew up in.  
    These young men's Twitter feeds and Facebook pages are the    roads along which IS has invaded Libya. The weapons and    expertise necessary to execute an operation of this complexity    are already here  legacies of a revolution fought by young men    with improvised weaponry and guerrilla tactics.  
    The only component missing up until now has been the intent to    target and harm unarmed civilians in large numbers  this was    the threshold crossed on Tuesday morning.  
    A tweet posted in the opening moments of the attack by the    'Islamic State of Libya' justified the attack as an act of    revenge for the death of Abu Anas Al Libi, the alleged al-Qaeda    militant snatched by US Special Forces from the streets of    Tripoli in October 2013  he died in US custody in New York on    January 2, apparently from advanced liver cancer.  
    In their pursuit of revenge against America, the men shot and    wounded guests on the hotel steps before entering the building    and calling a lift to take them to the upper floors, where the    hotel's few remaining guests were located. A remote or a timer    then exploded a pre-positioned car in front of the hotel,    summoning local militia forces to the scene, though by this    time, they were chasing the attackers up stairwells.  
    A dozen employees and guests were corralled high in the hotel.    The hours-long hostage ordeal ended with four of the attackers    blowing themselves up using a combination of suicide vests and    hand grenades. Another was detained. Most of the hostage group    was safely released, but nine of their colleagues had been    killed  some in the crossfire, others in cold blood.  
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Libya is destined to suffer more extreme Islamist violence