[simonh]

This has very little to do with terrorism. I'm sure you can find the odd counter-example, but most terrorists enter their target country perfectly legally and are often radicalised while resident in the West. Terrorist organizations know that such people can operate much more easily and are less likely to be monitored by authorities so that's where they focus their recruitment and operational activities. Anyone conflating illegal immigration with terrorism is snowing you in order to push an agenda.