I'm just watching Question Time, recorded from last night, on which they are discussing this very problem.
One gentleman in the audience suggested that our main concern should be the infiltrators in this country. His exact words were to 'raise the drawbridge at Calais'. We should not only not let any more in, but remove those who have already managed to sneak in. Therein lies the main threat to our country, and we should keep our noses out of the Middle East and leave them to live in their own mess.
I tend to agree with him.