:facepalm: Of course we need to remain vigilant about those who are already here or those being brainwashed, that goes without saying.
What would you rather happen? Deport all muslims from our country like Britain First would like?
Across mainland Europe, yes, but not so much here. If they are on a watch list, this would get flagged up when purchasing tickets (be it plane, train or boat). People do forget we do have some control over our boarders.