Oh great. Now he'll be released in time to pull off his big jihad. I agree with you; they're ALL freakin' crazy! Does that mean we should give them ALL a pass by way of the insanity plea? I don't think so!
Relax. He is being evaluated to see if he is competent to stand trial. That is determined by his mental status now, whether he is aware of the nature of the charges against him, has understanding of the adversarial nature of the judicial process, and its actors, whether he is able to assist counsel in his own defense, or whether by reason of mental illness he does not meet those critieria.
If he is found not competent, he will be committed for psychiatric treatment in a locked unit, to be "restored to competency." Treatment will include antipsychotic drugs.
When it is determined that he is restored to competenc y, the prosecutor will be notified and he can be bound over for trial. This has nothing to do with being "not guilty by reason of insanity," which is determined by his mental status at the time of the crime. What little I know about this case, I doubt there is any chance at all of an insanity defense.