It's a circle we have to break. Because we are owned, we think we can own too. Because we are in pain, we think we can put other in misery too. It's an enslavement cycle.
It's the opposite of 'don't do unto others what you don't want done unto you'. It's the golden rule gone black.
And we keep on doing this because it's so hard to see what going on because of the compartmentization/specialization.
I sometimes wonder what it must be like to be specialized in murdering animals for a day job. One person, specialized in killing animals so the rest of the us can eat meat without seeing the murder we are an acclompice of. So we can keep our conscience clean.
But just because we don't know about it, doesn't mean it's not there.
Yeah, the old bully motto: I have suffered so I will cause you suffering :/
People don't have a developed conscience really, they lack truer care to know objective right from wrong. They know sits wrong if they start to think about it in some cases, so they don't want to or just make justifications for why they need to keep doing things the same way... :/