French novelist Honoré de Balzac was evidently sensitive to the psychological phenomenon whereby good natured people can be most naive as to the wickedness, low mindedness and lack of enlightenment of others.
This makes them possible victims of mass mind control but perhaps not, in so far as the low mindedness of, say, the mainstream media, will not be to their taste and they will eventually seek out spiritually more enlightened forms of communication.
This insight he expressed several times in his novel Illusions perdues when scientific genius David Séchard is robbed of the fruit of his discovery on how to make cheap but quality paper by calculating, scheming and generally psychopathic business owners. David never even suspects that he might have been manipulated and forced to give up his discovery, thinking no one could possibly be that low.
The same could be said of Native Americans who welcomed and helped white settlers on what was their land only to be wiped out and killed, not to say enslaved, by said settlers who were obviously of a wicked-hearted not to say base disposition.
The one advantage I will say that comes with a good heart and the naivety it can entail - and its attending possibility of being abused by the base motivations of others - is that it does enable a more child-like, fresh and creatively successful outlook on the world.
After all Goethe (was it him?) was right in stating that genius is being able to summon childhood at will and Nietzsche echoed this insight in Thus Spoke Zarathustra when stating that work for a man should be akin to the seriousness of a child at play.