I shall respond on 4 topics below:
1. The nature of this thread
2. CS Lewis
3. Rationality
4. Personified evil
You can stop with the cheap asides at just about any time now, Hans. I take offense that you've stooped to describing C.S. Lewis as a "second-rate pre-teen fantasy author," and such a description of him, placed as it is in THIS THREAD, is offensive.
That is what he is best known for. Sorry, that's just the way it is.
It's also a cheap form of stonewalling. I'd going even so far as to say that it's a form of gaslighting, one used so as not to have to engage the Ethical and Epistemological and Semantic issues that might go into any one of us having to "deal with the Devil" in various ways.
Which weren't in issue in any recent post. This thread has gone aside from that. (See the first couple pages for the content you wanted to generate. Or one of several other contemporary threads.)
On the whole, The Screwtape Letters is no more an example of "pre-teen fantasy" than is Mary Shelley's, Frankenstein; or, The Modern Prometheus.
Check my post again. "pre-teen fantasy" only refers to the author. I never said "Skrewtape" was pre-teen fantasy. "Narnia" is pre-teen fantasy. Frankenstein is adult horror-fantasy.
Please stop with the cheap asides and the stonewalling.
I can move on to my main response shortly...
Besides, all you're really doing is showing just how applicable chapter 1 of The Screwtape Letters is to your atheistic perception.
You should know by now that the one thing I haven't done is read said text.
Main response:
1. On the nature of this thread.
This thread was like several others in this section over the winter was on the "moral degradation of the west" (or some similar topic). It's prime "hook" was commentary by Ben Shapiro. As a political commentator, he seemed a bit out of place in the "morality" section, but I checked it out anyway. For my efforts I got a 15+ minute rant about america's decaying morality. I watched most of it. (I did hit the "skip 5 sec" button a few times when his rants would get redundant or repetative.)
The OP didn't place the "Screwtape" in context for those of us who aren't "Christian philosophy geeks" (no shame implied either way) and the video didn't do any of Ben's viewers any favors as he didn't put the book in context either. A simple 1 minute overview from Shapiro, or a proper description in the OP would have made a big difference. This was compounded by Ben's poor delivery where it was difficult to tell when he was reading the text and when he was reading his commentary. (Some, perhaps all it is not clear, of the text was put on screen. So at least we know *that* was CS Lewis.) The lack of context meant that every time Ben said "Screwtape says" it wasn't clear if he referred to the character (it seemed to be a character) or the thesis of the book. Some clarification and a better script from Shapiro would have gone a long way.
2. CS Lewis
To the general public, if he is known at all, CS Lewis is known for the "Narnia" book(s?). "Narnia" is fiction for adolescents in the fantasy genre which makes CS Lewis a "pre-teen fantasy writer". He been outpaced by his rough contemporaries like Tolkein (Hobbit, LOTR is not "pre-teen") and Dahl and a generation or so later the space-fantasy Star Wars and a further generation or so by Harry Potter. Does that make him "second rate"? I don't know, perhaps more "largely forgotten". I only read the chunk of Narnia in our 6th grade reader and had no inclination to read anymore while I went on to read Dahl, early DC (Batman & Superman), Asimov, Clarke, etc.
Until a few years ago I'd not even known he wrote Christian stuff. (And lest you accuse me of gaslighting you again, I believe the book I've heard about is call "Mere Christianity" a book of apologetics, a topic which holds no interest to me.)
3. Rationality
Your irrationality grows with each new post.
Rationality, from a non-technical point of view as I am not a philosopher, is just coming to conclusions based on the evidence available to you and your assessment of the quality of that evidence.
Is it irrational for a housewife to suspect her husband of cheating on her with his secretary when he comes home late smelling of beer and cigarettes with a lipstick smudge on his collar? No, it is not, but she should obtain more information as it may have just been his pals taking him out to celebrate a big sale after work and an overly affectionate waitress. If it is, then she needs to reassess her conclusion to remain rational. [I don't know why my example works best in a time frame when "housewives", "smoking in bars", and "secretaries" were still a thing. Perhaps it is this thread.] In short "rationality" is not about having the "right" conclusion, but one based on the evidence available to you.
So am I being irrational about
4. Personified evil, or demons?
Let's consider the evidence available to me. What evidence is there relating to personifications of evil or demons? How good is that evidence?
1. Claims from the religions of many cultures about the existence of demons.
2. Various reports of personal experiences plus associated accusations of possession.
3. Ability of human psychology and sociology to explain the vast majority (if not all) evil deeds.
4. The general incompatibility of non-physical or supernatural entities with the results of physics.
Since personified evil is not necessary (3) to explain the "evil" we see in the world there isn't really any need to include such beings in my worldview. That I don't find the evidence of types 1 & 2 convincing does not override that. (4 is just the kicker.)
I'm also not saying it is irrational to believe in demons. If you put more weight to #1 than I do (particularly ones own culture) then you may rationally come to the conclusion that they do exist. But your conclusion does not mean that I have to give the concept that I have now rejected an serious consideration.
Because it seems to come up, the implication that my "atheistic worldview" has made me reject demons, it is not the case (and closer to the reverse.) I never believed in demons, nor ghosts, nor the gods of other religions. What made me an atheist was when I realized that my conclusions about other gods and supernatural beings also applied to the god a had believed in. It no longer satisfied my reasons to think it was real.