Talk about a loaded question lol.

I've continuesly kept my veiw point that there is no Good and no Evil.
There is Light and Dark for sure, but the Dark is not more evil than the light is good. One cannot exist without the other.

But the way i look at it (in keeping with your referance to the Holocast) From their veiw point of the Nazi's what they were doing was a just cause, to them it was the right and Good thing, while to everyone else it was without a doubt a discustingly Evil act.
On whats Good or Evil it all depends on who's perseptive your looking from, so unless everyone is apart of the same unified perspective and there are no sides that's the only way there could be a good side and an evil side. But since that is completely impossible in every concievable way it is therefore impossible for Good and Evil to exist.

Believe me i've been ridiculed for seeing the world this way. I've been asked by a dozen people, "Well what if some old guys rapes and kills a little girl? You don't think that is Evil?" and it pains me to say that from that mans perspective what he does isn't Evil, he doesn't consider himself an Evil person. Thankfully the Law and Justice system does not convict people of being Evil or Good, they are innocent or guilty which is hugely differnt.