That's because you're choosing not to. The US conspired to invade Iraq by inventing evidence that it was a threat to the world because it had weapons of mass destruction. It assured other countries that it had irrefutable evidence in order to gain their support and approval for their invasion which the UN did not approve.
Many people didn't buy their claims and called it a conspiracy which later proved to be correct when the weapons failed to materialise, although the US government has never admitted it lied.
The evidence for 9/11 being staged, in order to invade Afghanistan, has reached overwhelming levels that make the government version fodder for the closed minds it was always intended for.
