Sure. Fair enough. If you go back far enough, you can look at the huge intake of immigration in the early twentieth century. We needed large numbers of immigrants; we needed large numbers of unskilled immigrants to fill up the west in particular. Then there were periods when we didn't have much immigration. So you really have to look at the current period.
I'm not sure I grasped your full question. Do you mean should we have taken fewer on security grounds? Could you please amplify it a bit?