Let me throw in a very very simple-to-understand example for those who just don't get it and not willing to.
Let's change a subject just for a minute for a cute little quiz.
Picture below is a classic symbol of Fascism.
Branches tied by rope represents united citizens supporting military dictatorship(represented as a axe-blade).
Hatchet.
Mussolini first used it as his symbol of power in Italy.
Adolf Hitler and the Nazi's adopted it as well.
And here's another one.
In US Congress...
It's been there since very long ago.
George Washington with it.
Abraham Lincoln with it.
US National Guard don't mind it.
US Senate like it too...
In fact, nobody cared...
Now...
If someone goes "Hey! Why is that symbol of fascism all over our country of liberty? WTF?!? I want explanations! Something fishy is going on here!" Would you label him as another conspiracy theorist? If so, why?
For those who would will need to do one of the following:
1) Prove that this symbol is not a symbol of Fascism
2) Prove that the US versions are not identical to the original symbol of Fascism although similar and carry different meaning (thus same as 1).
3) Prove that these pictures are fakes.
hmm.. what else.. well I'm sure you got my point regardless.
The same goes for 9/11 matter.
As far as I see it there're hard, documented, interviewed evidences to support the conspiracy claims plus the questions about so many coincidences(with near 0 probability) happened related to 9/11. And yet people are flaming at those who question and claim and investigate while not willing to, if not incapable of, logically criticize and discuss. It's utterly disgusting work to get those people's mind open, because they just won't open. People try so hard not to believe what they don't want to believe and not to question what they don't want to know about.