Please let us all know.
It's called P r o f i l i n g
Something which we are apparently loath to do less we are considered racist, phobic or anti-whatever. The "let's treat everyone the same" approach is a waste of time and effort, diverts valuable resources from their real targets, focuses on the innocent, gives the public a false sense of security but worst of all, completes the terrorists job.
And your solution is... or are you also part of the problem?