Until you understand what a moral truth is (which you clearly don't) then I can't really debate with you.
I don't think you can do so given the definition. Just kidding. By all means lets clear this up.
Truth is several things.
1. It is not a matter of perception, opinion, or acceptance.
2. Truth is independent of human apprehension.
3. Truth is an objective quality.
4. Truth is almost always an exclusive category.
Moral truths are value conditions that apply to the correctness of an action that is objective in nature.
A moral truth can ONLY exist via the vehicle of a sentient being who can have negative associations with it. They are formed only in functional situations.
That is not true. Just as Pluto's existence is independent of our knowledge of it moral truths must be independent of our apprehension of them. There is an obscure category where you would be correct. If I said that murder is morally wrong then it is an objective fact that I said it. It however is not true because I said it or believe it. It is only true if it is true independent of anyone's perception of it.
How can something be moral or not without a victim? How can it be moral to harm a rock? Can a rock be harmed? The answer usually is no. The rock has not sentience.
I will show the absurdity of your criteria by simply applying it. If sentience is the foundation for morality or (more properly unjustified actions against sentient beings) then why is murdering a human more wrong than murdering a gnat? By your own standard you probably committed a hundred cases of murder on your drive to work tomorrow. As usual my world view resolves these self contradictions your creates. I have more value to God than a gnat and they were subjected to humanity by their creator. You can derive no actual value for any life or anything without God. human flourishing at the expense of every other being on the planet is not moral it is speciesm.
A human has sentience. A human can hurt. A human can be subject to harm. From the point of view of the victim we can determine if something is moral or immoral. Are you with me so far? Because you have a massive misunderstanding and I'm trying to find out where it is. Tell me exactly where I loose you.
I am well aware that we can cause pain to others. You have not said why doing so is actually wrong. At best you have said it is not preferred or convenient and has become no more than a social fashion. Look, I do not think you are being condescending on purpose but you are completely wrong. I know exactly what the state of moral argumentation is among the best scholars through ought history. I am not for a second suggesting you are unintelligent but you are really not knowledgeable about this issue. That is proven by simply applying your irrational standards. I hope you can see the failures the generate and mine do not. All the way back to Israel, Greece, and Rome men of learning have classified at least much of morality as being against objective standards. This is not new or rocket science. Truth has burdens, your claims do not meat them. If God exists then mine do. I know exactly what your saying and I know exactly why it can't possibly be true. If you wish I can supply some of the best philosophers in history in their own words adding to what I have said.
It is not simply that your are incorrect, it is there is not even a theoretical possibility you can be correct.
To continue, we have apathy. This is a functional evolutionary step of our intellectual nature. We have developed the cognitive ability to innately precieve the point of view of another. We can put ourselves in their shoe. In fact legion can tell you more than me I am sure, but if we watch a video of someone else being hurt the exact same parts of the brain light up that would if we were being harmed.
Not one thing here makes any act ever committed actually wrong. It may make them unpopular, it may make them undesirable, against a social convention, or against an intuition. What it can't possibly do is make murder is wrong a true statement.
Let me illustrate this another way. Empathy is at it's core an opinion. Hitler thought wiping out the evil Jews was an empathetic act that led to a greater good in the long run. By your standards above how was he wrong. Whose empathy are we to use as the basis for law, popular opinion, mine, yours, Hitler's, Muhammad's, or Billy Graham's? Your morality has an illusory, ambiguous, and moving target for a foundation.
I think you may be confusing the ontological argument for moral truth with how do secular humans resolve moral issues.
Apathy is the key to morality as morality only exists within a population. The morality of humans stems from the evolutionary drive to survive and reproduce effectively. Doing so we have found as creatures that are more intelligent that we can work together for a common good. That produces far more productive offspring than a cutthroat system.
Then will anyone's sense of apathy do? Are you satisfied if Charlie mansion's sense of apathy is the standard? I am a veteran and have seen people so devoid of moral sanity that their sense of apathy would be what most would call evil. I don't mean a slight minority either. I mean a huge proportion of humanity.
I was aware of everything you have said long before you said it. This is a description of how humanity has at times resolved moral issues. It has nothing what so ever to do with moral fact.
Not one thing you have suggested has the slightest power to make rape is actually wrong a true statement. That reminds me of something. You said where no victim is present that no moral wrong has been committed. Then why do we lock people up for a long period of time for attempted murder. We even lock people up for thinking evil things. The other day I heard in Britain a man was jailed for drawing pictures of children in weird scenarios. No child saw it, it was not on public display, no one was hurt. Or how about a victim who was also sentient but no wrong was charged. When a dolphin forcibly copulates with another dolphin by your standards they should be arrested.
So within the scope of the victim and our own innate apathy we developed through our evolution we have something that in each and every instance would be morally wrong always. Its not simply subjective but intrinsic.
I am pretty sure I see why you are not getting this. I have grown to like you and so it may be best to summarize this discussion this way.
You are describing how some groups of humanity may have resolved ethical issues when necessary. That is not what I was talking about.
When Stalin kills 20 million people or a little girl is raped you, me, and 99% of humanity believes they have done something objectively wrong. That belief has been in poems, songs, literature, dissertations, moral commands, legal foundations, philosophical discourses, and theological texts since they existed.
Your discussing epistemology not ontology. Your claims reduce what Stalin did to acts against social fashions or conventions and not actually immoral truths. I would hate to think the free-world only had that as the motivation for stopping Hitler and fortunately we had God and that is what Britain's, France's, and the United States leaders appealed to for justification, not apathy or the ability to put our selves in another's place. They said he had violated absolute moral truth and that is justification for using force to stop another not what you have said.
Nothing you have said rises above arbitrary opinion. That is however all that is left if God does not exist and my entire point. So if you are satisfied with that then there is no contention between us.