One of those there is not like the other. Just because we hear repeatedly that the 9/11 story is fully understood doesn't make it true. There is absolutely nothing far fetched about the idea of a conspiracy around 9/11, whether the the evidence is there or not. The motives are there and there is plenty of evidence of lying and false flags throughout history, including recently in the US. Please read on Operation Northwoods and the Gulf of Tonkin incident. This sort of thing involves human politics and is simply not in the same class as reptilian overlords.
I don't know what "inside job" means to everyone here, but it's pretty clear that elements of the Bush administration had foreknowledge of the 9/11 attacks.