Everybody knows this instinctively even if they don't all grasp it intellectually. And many people have become mentally unbalanced, sick at heart or twisted because despite their instinctive knowlege, they can't consciously acknowledge it. And the more people deny the truth, the sicker they get.
In this case, the writer is talking about 9/11 Troof, suggesting that not believing it was an Inside Job is bad for your health.
Unfortunately, as with just about every other Truther claim the evidence is against him.
As in the case of ex-MI5 spy David Shayler, who became the Messiah...
...and then became... erm... Delores Kane...
Or freakily so, in the case of Alex Jones...
Or in the case of Jimmy Walter who appears to think he's a chicken...
Or tragically, in the case of Sean Fitzgerald...
I don't cite these examples just to engage in ad hominem attacks but to show that if there is any correlation between what someone believes about what happened on 9/11 and mental imbalance then it is the Truthers who come off less favourably.
One thing I am not sure about, however, is whether it was pre-existing mental imbalance that attracted Truthers to their theories or whether the belief in 9/11 Truth made them mentally unbalanced.
There is some evidence that it was there already in this case and in this one:
