the truth is not black and white

Good and evil are not black and white either. This is because each individual person has her/his own unique experience. We share many truths, for example, most people can observe that an apple will 'fall' off a tree towards the surface of the earth. There are many experiences that humans can share and for the most part agree that they have observed the same phenomenon. However, each persons experience of those phenomenon are still different. To review a conversation I had a few years ago, we will examine the problem of the have-full cup of water. The optimist says the cup is half-full; the pessimist says it is half empty; another person says "the cup is mine"; yet another "what a pretty cup!" I might say "can we share the cup?" I can think of someone who would wish for beer in the cup, and others that would find that idea repulsive. None of these statements about the cup is any more 'right' or 'wrong' or 'good' or 'bad' than the other.
Now let us turn out attention to the story of the blind men and the elephant. For this I refer you to this excellent article: http://en.wikipedia.org/wiki/Blind_Men_and_an_Elephant. To state what is, to me, obvious: this story is a clear example of how our experiences shape our vision.
The inability of humans to tolerate varied viewpoints within it's species has been the bane of our existence since the beginning of time. I have even seen curious juxtaposition within a single individual where they hold two seemingly mutually exclusive beliefs at the same time. In all of the cases where I have observed this, those individuals have appeared to be locked in a seemingly unresolvable struggle. Go back and read the previous two sentences again. I can only make this observation from my personal point of view. Others, and especially the individuals involved, may draw entirely different conclusions from their observations. It's a big elephant. There are lots of options. Furthermore, because our observations are limited by personal experience, it is impossible for us to fully comprehend another person's point of view. Each individual has their own, no matter how much a certain set of people might have in common. To even try to attempt to argue otherwise is to invalidate realms of human experience. Any attempt to convince another that the other's perception of an experience is invalid for any reason, is to court the possibility of bringing into question all of that person's judgment and therefore all of their self-worth. This is the reason humans have wars.

In closing, let me share with you a song by Harry Chapin.

( There are so many colors in the rainbow So many colors in the morning sun So many colors in the flower and I see every one )