Europe has been bled white by two savage wars and now made soft by sixty years of living under American protection. Who's going to provide the soldiers for their armies? Furthermore that history that he invokes. Does he not know how close the Muslims came to overrunning all Europe in the 16th Century? Does he not know how dependent Europe is on mideastern oil?
Of course he knows about the siege of Vienna... And they lost...
And if people are in danger, they start to fight... The rabble in the muslim suburbs of Paris won't last against even one battalion of the Legion étrangère... And they may be let loose there...