> Would that questionnaire have identified that young, quiet, white catholic terrorist killer?
Possibly, but it's difficult to say based on your description, because age, skin color, general quietness, and religion are not on the questionnaire.
But to your broader point, could a questionnaire be written well enough to reliably identify all terrorists? If it only significantly improves detection, I'd think it would be worthwhile.
The problem with that reasoning is that if you rely on a detection method that's biased towards a specific target a competent terrorist organization can profile that method and then have a better than average change of passing through by behaving in an opposite way. That's why profiling doesn't work all that well against any sort of sophisticated enemy.
Possibly, but it's difficult to say based on your description, because age, skin color, general quietness, and religion are not on the questionnaire.
But to your broader point, could a questionnaire be written well enough to reliably identify all terrorists? If it only significantly improves detection, I'd think it would be worthwhile.