There seems to be some confusion here. The author is upset that a terrorist was in his jumpseat no matter how he got there. Or whether he used real or phony credentials.
What does that have to do with overly cautious procedures put into place AFTER the attacks?
Now showing that pilots were not faced with such scrutiny would be another matter.
I think it's preposterous to, in the same article, note with horror that a terrorist used fake pilot credentials to gain access to his cockpit, and simultaneously complain that he is subject to rigorous scrutiny despite the fact that he carries pilot credentials.