these people spread this stuff because they want people to doubt everything they have been taught about the past, after that they become easy to manipulate.
excellent point Genghis.
It is a two-bladed sword when one willingly starts to purge one's mind from whatever one has been taught; because without a proper and wise ability to discriminate between the good things that one has been taught and the bullshit and lies, one may end up just becoming an empty vessel for any sort of crazy shit to re-fill the mind, potentially leaving you in worst shape than you were before.
I'm sure we can all agree that the governments of the world lie to us a lot in some instances in order to advance whatever agenda they have for the citizens, or simply to cover up their corruption and thievery;however, we must remember the 'government' is made up of individuals like all of us, that need to eat, shit, wash their asses and sleep; and no individual is the same...not everyone is out there to get you and micro-chip you.