You seem very comfortable in your atheist/agnostic perspective (like many on this thread) and those often work well for individuals or a small group. I've seen your posts on other forums and think you're an intelligent person. The problem with your "rational scientific" approach is that you really have no comprehensive set of ideals that you strive toward, or at least not any that you can claim authority over others with. Yours is the contrarian view, using circumstantial evidence in examples provided (a person identified as X and committed atrocities therefore X must be bad) to act as proof of faulty ideals. Then you present a scientific methodology to argue against circumstantial evidence as if it presents your side with validity? It's not even worthy of naming it a straw-man argument.
The truth is, nobody here is really qualified to speak here with authority on any of these things. We are people of material sciences not philosophical ones. We can (and should) give our opinions but in a constructive, not destructive way and certainly not with condescension. Philosophy and Theology are studies that are not valued at all in today's "Information Age" but they would be the ones to help find where humanity should go.
As far as nobody here being "qualified," this is an medical internet forum with a long history of off-topic posts, so I don't think anyone here is assuming anyone else is a professional philosopher. That being said, my bookshelf is filled with as many books on history, economics, and philosophy as it is with books on the material sciences, so while I'm certainly not an expert, I have put a couple decades of thought into developing a worldview, and I'm as entitled as any other layman here to share what I think.
Regarding having no "comprehensive set of ideals" that I strive towards, I don't think you really thought that through when you said it. Is it your contention that a naturalistic or materialistic worldview is incompatible with having ideals? Correct me if I'm reading you wrong because that claim is just plainly false. Being religious is definitely not the only avenue to a "set of ideals" given that plenty of secular philosophers have developed extensive, internally consistent, coherent ethical frameworks.
However, there is one spot in which you hit the nail on the head. And it is when you stated "...at least not any that you can claim authority over others with." That's actually my precise assertion as a general adherent of naturalism: there is no ultimate authority that
anyone, including myself, can use to claim moral superiority over another. And this is where you're imagining strawman and misunderstanding what I said about "people of X or Y faith-based belief..." So let me make the statement again clearly:
If person X with a secular belief system commits an atrocity, other people can easily state that his actions were wrong using only naturalistic or materialistic ethics. He was just some guy being a guy.
If person Y with a religious, theistic, supernatural belief system commits an atrocity, other people do not have the same recourse available. If I say that his actions were wrong based on my secular humanistic principles, or wrong based on a secular sytem of laws/ethics.........so what? The Spanish Inquisitor says God commanded the torture. The Iranian police commander says Allah willed the dozen schoolgirls to burn to death rather than let them out uncovered. Tom Cruise says Xenu commanded the kidnapping/brainwash.
Can you see the distinction here? If person Y is entitled to his own unverifiable, unfalsifiable faith-based beliefs, then how can you say that his atrocity is based on false premises? To belabor the point, you can't. They're unfalsifiable. When you said earlier in the thread that "no reasonable religion" would allow such and such, think for a moment about what exact external criteria we're supposed to be using to decide what's "reasonable" when we're talking about how a supernatural deity wants us to act.