It is expressed clearly within a few posts from another thread which I will quote in full:
OneWhiteEye wrote:This comment by jimd3100 says a lot:jimd3100 wrote:An odd interest, more interested in small insignificant "fringe" groups tied to 9/11 than the 9/11 event itself.......
I have wondered about this from the very beginning. I don't spend my time arguing with flat-earthers. Why on earth does this insignificant fringe warrant so much more attention than the event itself? There seem to be no end of apologists and excuse-makers for the authorities from certain segments, the same segments who get up and hit the 9/11 forums every morning and all day long to take postshots at the evil truthers who are corroding the very fabric of reality with their nonsense.
There has always been a VERY strange element of "move along there's nothing to see here" furthered by "and if you keep looking, the sky will fall, therefore we must hound you to the ends of the earth." Of the few people who claim that 9/11 Truth is an impediment to uncovering real systemic problems of legitimacy, I see almost zero time spent pursuing such issues and inordinate amounts of time spent mocking nonsense on the insignificant fringe (and also mocking virtually every credible criticism raised as well).
Fucking weird, if you ask me.
This comment is followed by one from Stundie...
stundie wrote:I couldn't agree with you more OWE.
I've asked this very question myself and forgetting the....."They are all shills!".....argument, it doesn't make an ounce of sense.
You have to ask yourself, what would motivate you to get up and go to forums to argue over something you instinctively believe is true.
It makes no sense does it really!
Like you've just said, you don't spend your time arguing with flat earthers because you are comfortable in the knowledge that the earth is round.
So the only conclusion I can come to is that at some level, deep down, they are not 100% convinced by the OCT themselves. They argue so strongly in order to confirm their own bias in the OCT as it's much more comfortable to believe in the OCT than to admit or believe otherwise.
I don't go over to Christian or other religious forums because I'm more than comfortable in the fact that there probably isn't some man in the sky watching over us. If I wasn't comfortable with my own atheist/agnostic position, then I would probably be over at one of the religious forums mocking others for being dumb enough to believe in it. That's the only motivation I can think of.
This can be seen over at the JREF forum, when something which possibly supports the conspiracy side of the argument comes out as true, you will often see plenty of pantomime debunkers say things like "So what?" ....or "Don't care!"... "Why does it matter!" etc etc.
I'm sure this is not the case for all debunkers who come here or at other forums. Some of them know and understand that not all the questions have been answered surrounding 9/11 and are here to do honest research for themselves and to find answers.
Just my 2 pence worth.