This is not idle conspiracy theory , this is being of sound mind and knowing a Plane that size will not fit into a small hole !!
Oh dear..I agree with Brian Abraham on this one !
The aircraft disapeared into the Pentagon easily. As you say, take one plane at 500 mph that is made from tin and spear it into multi layered building constructured of multiple steel and concrete walls and what you get is small entry hole that disintegrated the aircraft. No conspiracy in that, sheer mathematics will prove that.
As for the Towers, it was not difficult to mark them on a beautiful sunny NY day, regardless of the speed and dynamics of the aircraft. If you can drop a 767 on the piano keys at JFK then you can line one up with the two giant beacons they struck. The
who pulled off the stunt were lucky with the weather, but had enough training to steer an already airbourne craft.
There is no conspirancy in all this. Sadly the Yanks saw themselves ( and to a degree still do) as indestructable and some people still do not want to believe that the events of 9/11 could be pulled off by a group of nutters so easily. Sorry frriends, but it
was that easy for them.