Scary, or what?

I have recently been studying the various 'conspiracy theories' surrounding the events of 9/11.

At first, I thought they were just plain daft. Could anybody seriously believe that the US government would 'mastermind' the destruction in New York on that day?

But so many people: airline pilots, scientists, demolition experts, CIA Whistle-blowers and even some politicians are putting forward all sorts of 'explanations' challenging the official account of what happened.

From what I can see, these theories range from holograms to  drones; real planes, but not piloted by jihadis to real hijackers whose intentions were known in advance by the government (or some part of it) and allowed to go on anyway.

These theories cite the 'false flag' practice, allegedly routinely carried out by security services around the world: rigging some sort of 'atrocity' and then blaming some other country.

As regards the 'hologram' theory, which sounds so far-fetched as to be laughable - it is pointed out that military technology is '50 to 100 years advanced of anything we can imagine.'

If any of these 'explanations' are true, then what are we to think? Of governments? the security services? the military? Are we so 'out of touch' with what is really going on?

If so, should we be truly afraid?