1. The number of people who believe something to be true has nothing to do with whether it's really true. This describes believers in the official story.
2. No qualifications put anyone above the risk of error, misperception, or self-delusion. I would not agree that mental health professionals are in any better position to evaluate the evidence than anyone else. This includes you.
3. The evidence available does not sustain the conclusion that 9/11 was an inside job, that the buildings came down in a controlled demolition, that a missile hit the Pentagon, or any other of the bizarre conclusions you conspiracy theorists have arrived at. The lack of evidence to support the official story and the strange coincidence involved would make a true sceptic scepticle. You seem to be a part time sceptic.
4. Your last sentence is a false dichotomy. I'm guilty.
5. You still don't know how to think clearly or evaluate evidence. That's innaccurate, everytime I make a mechanicle repair or build something I do both, very well, for money.
6. You'll never give up until you do Why should I give up? I'm right. You're part of the controled mob of believers, you may have at one time feared a nuclear strike from Iraq.
7. You probably never will. You're at last correct.
8. This is a waste of time and energy, so I'll stop now.