The annual risk analysis by the European Union's border force, Frontex, makes for sober reading. The European Union often does not know who it is letting in, nor who it allows to cross its territory:
"the identification issue concerns the potential threat to internal security. With large numbers of arrivals remaining essentially unclassified for a variety of reasons, there is clearly a risk that persons representing a security threat may be entering the EU." (p.61)
The danger this poses was evidenced last year:
"The Paris attacks in November 2015 clearly demonstrated that irregular migratory flows could be used by terrorists to enter the EU. Two of the terrorists involved in the attacks had previously irregularly entered through Leros and had been registered by the Greek authorities. They presented fraudulent Syrian documents to speed up their registration process." (p.7)
Britain has a degree of protection against such individuals, as we are not part of the Schengen agreement allowing free movement across the EU. However there is nothing to stop British jihadis mingling and liaising with such individuals once they have entered Europe, and all would be able to enter the UK, unquestioned, as soon as they obtain EU citizenship. Indeed Angela Merkel has guaranteed the right to remain to all Syrians, making Syrian documentation, whether genuine or fraudulent, ever more valuable to those with malign intent.
The European Union is making Britain less safe.