Empiricism is blind to most of human experience.
I'm still waiting to hear how outsourcing your moral judgments to external human artifacts somehow implies moral absolutism, as opposed to self-reinforcing intersubjective moral relativism.
I don't have any idea what your last sentence means. But I am making the case that something can be real and objective without being empirical.
My last sentence is thus: just because you take your morals from a book doesn't somehow imply that there is a universal, correct morality. Christians are all still moral relativists, their morality is just relative to a human artifact and reinforced by the intersubjectivity of the other people who also take moral cues from that book. The only case one can make otherwise is, "Look, I have no evidence for an objective morality, I have no particularly good reason to believe it exists, but I have faith that it does and so should you." Which is fine, even if I find it personally stupid, but I can not imagine a single Christian argument for an objective morality that doesn't necessarily require faith as an axiom. I do not have that faith, yet I am a moral person. Religion is not required to have a conscience or to treat your fellow humans well. Therefore, I will not pay any attention to Christian claims towards uniquely privileged knowledge of the divinely mandated correct morality; instead, I will treat them the same as any other person, based on what they actually do.
EDIT: I also like how not once do you even try to make a clear distinction between absolutism and relativism, nor do you try to explain how outsourcing your conscience to a religious book somehow implies universal absolutism.
We should take what makes sense from religions, cherry picking the parts of social progress that was somehow made under such an authoritarian and mind-numbing mental opium, and discard the rest. Any claims of moral superiority on the basis of religion should be outright rejected. The metaphysics are likewise senseless in my opinion, so I choose to ignore them.
So, in short, I don't find your position very convincing. Also, if Christians were some sort of uniquely enlightened group with special access to the metaphysical groups of the universe, why do they keep falling into the same patterns of behavior as all the other humans who don't have this divine guarantee? Like, if religion was actually some special basis upon which to erect a human morality, why does it achieve such similar outcomes as every other basis? If it's because "humans are fallible and don't always accord perfectly to the perfect divine plan allocated to them," then, again, how is that exactly non-relativistic? Is it because the book exists as some sort of measuring stick by which to determine the essential goodness of someone? Because even that depends on the fallible interpretation of the interpreter, unless you presuppose some special person who is blessed with divine discernment to determine the actual divinely-approved interpretation.
It all ultimately devolves to "you just gotta have faith bro." I do not have faith in an entire group of people thumbing their noses at everyone else like their shit doesn't stink. Antisemitism and hate is literally built into every canonical version of Christianity by way of the Churchfathers.
Maybe we should judge Christianity on the outcomes of Christians, instead of on the most compassionate and kindest way they beg us to take their positions. Actually looking at the facts reveals something most priests blush about... we're all equally clueless. The major difference between me and a Christian is that I don't actively look forward to dying, in the hopes I'll get The Good Ending and have an infinitely good time after I've perished in service to people who have an incentive to get me to live my life in service to them.