Jesus commands us, His true disciples to "WATCH" and be not deceived. These commands are all in the context of the Last of the Last Days. From this, it must be concluded that a wise and obedient disciple is one who is first, a critical thinker and second, one who is willing to question EVERYTHING. In otherwords, 'a Berean' (Acts 17:11).
Everything above in play, we must expect that the prince and ruler of this world has succeeded in some pretty massive, and long standing deception upon humanity