Earlier quoted context omitted.
You're right that there are many ways to profile, but race and religion have been historically pervasive profiling techniques. It does seem more fair to simply put everyone through the same process. If you're annoyed at why you (an innocent) have to be subjected to such stringent and time consuming security, that's how innocents who fit "the profile" might feel as well.
If those doing the profiling are interested in being successful, and race and religion prove to be ineffective indicators of threat, then such profiling should stop (or bombs will keep getting through at an inordinate rate). Otherwise, race and religion are simply observations about passengers which have value in directing attention.
I mean maybe if the profiling is being done by robots, but in reality I have my doubts.