I was talking with my Italian friend a while back about illegal immigrants. I told him aout the UK's welfare system and extremely abused policies of letting all and sundry in (even after they have travelled through dozens of safe countries to get to the UK and therefore contravened the Geneva Conventions on Refugees).
I asked him what happened in Italy and he said we put them back on their boat and send them home.
I lived in Italy for a year, and I can testify that thousands of them missed the boat back. They can be seen in every marketplace in Italy hawking their wares. They may not all be Moslem, but they are illegal - and nobody seems to care (reminds me in a way of our own US of A.)
The problem is that now that the UK has wisely chnaged its immigration policies to forbid entry of extremist Muslims, the open borders of the EU will still put the UK in danger.
Since the EU permits free travel among its member states then immigration policy must be EUwide.