This is going to sound awful, but you are partially correct. the thing is, little old grandmas NOT of middle eastern decent are less likely to have a bomb in there kiester. We have to suffer being searched because we dont want to profile. TSA is an example of political correctness gone wild.
And, if we profile ethnicity, all the idiotic terrorists have to do is recruit another John Walker Lindh.
We need to seriously profile behavior. Supposedly, we already do, but I don't see it being done seriously. Also, I think they need to be more selective in recruiting TSA agents...like get a brighter bunch of them so that they CAN do behavior profiling.