Hmm, I see your dilemma. But see it from this view: there are worlds beyond this one, yours, and mine. Perhaps in another world, demons are born as a race and people rather than being a forsaken being filled with evil and hatred. To say one's world is a falsehood is to paint an entire people with a very dark brush.
[The future had been kind to the samurai in its lessons and broadening of his mind, but he knew it could not be the same for all people of all worlds.]
The only way in the end to realize what is truth is to know a person and see through their eyes; to hear them speak, and watch them live. Would you wish for you or your kin to be branded as evil and despicable simply on first sight, just from what one assumes without even taking the chance to see who they truly are inside?