"Do people generally believe that hurting and killing for pleasure/gain is
wrong?"
Yes. As far as killing our own species, the majority thinks so.
"Do they obide by these morals because of the law or because of primitive survival instinct?"
I think both. Before there was mans law, we were reproducing. A lot of people base their morals on what society suggests, so the degree they view killing is based on that, maybe on the most part. Aside from that, most people don't want to kill by a land slide.
"Do individuals who display the desire to ignore 'morality' do so as not to conform, or have they been deprived of such experiences resulting in curiousity?"
They both exist as well as others who have different reasons.
"Honesty is easier alongside anonymity, so what are your feelings?"
Killing is only nessary when it serves a purpose for life itself. There are those who claim to do this for enjoyment, but as far as right and wrong is concerned, the majority rules and those who destroy out of pleasure are the ones who need to be dealt with.
What prevents those who kill out of spite and enjoyment, is lack of consciousness within themselves and everyone else. One with ultimate consciousness is empathic to a point where they will know and experience everything they do to others. Such a person does not precieve themselves as 1 self, but as all people animals and even things. To be all knowing is that literal.
Of course we are not on that level, but the only way to become so, is to be prepared for it. To be unvielled, to be seen, all truths exposed. Even if killing makes you happy will it come out in the open. Even those who kill out of enjoyment are useful, as we are now being forged into who we are.
"Any reference to Nazis and concentration camps would be great."
Look up FEMA camps. Or youtube it.