In the 1950s, in Great Britain, the basic accuracy of the gospels was a lot more widely shared assumption/presupposition than it is today.
If you're going to accept Jesus as a good human teacher, but not accept that he actually taught what the gospels say he did, then you have a good teacher but no teachings. And maybe that's a position that a lot of people like, because it leaves them an empty figure into which they can pour whatever teachings they personally favor, but I think it's rather a cop-out. (A steelman version would be: "I think he was a good human teacher, but no reliable record of what he actually taught survives, so we cannot claim that any particular teaching or position has his stamp of approval." But I still think that's weak. If you can't trust the record of what he taught, how can you trust the record that he was a good teacher?)
Accepting the gospels, the liar you describe is still offering people eternal life, at a price - "take up your cross and follow me". (The cross was not just a burden, it was an instrument of execution.) If the eternal life isn't there, it's hard to describe that as a benign or beneficial lie. Note that many of his followers were executed. (Our record of that doesn't depend on the gospels - Tacitus also says this.) You may say that this still falls short of Lewis's description, but it's far from your description. (I'd have to go back and reread Lewis's argument to see how tightly he has boxed people in on the "liar" branch.)
>Accepting the gospels, the liar you describe is still offering people eternal life, at a price - "take up your cross and follow me". (The cross was not just a burden, it was an instrument of execution.) If the eternal life isn't there, it's hard to describe that as a benign or beneficial lie.
If you don't actually believe in the supernatural stuff it seems like the definition of a benign lie. He thinks having society follow his broader teachings would result in a much better society on net, regardless of some people being killed for following and spreading it. He thinks that you go in the dirt when you die so he says, hey, actually you go up to this great place. This really helps it catch on and spread. Nobody finds out that part's not true because when they die they just go in the dirt.
Any kind of large-scale change will have some specific people dying compared to the counterfactual of not making the change. To assess whether the change is benign, positive, or negative, we must grapple with both the positive and negative impacts.
For example, I could wave a magic wand today and fix climate change, saving millions or billions of lives. But since I did so, some granny slips on a patch of ice next winter and dies from the fall. Without my magic wand, she would have lived.
Now, I don't specifically know who this granny is before I choose to wave my wand, but as a thinking individual I understand that some such granny must exist. In fact, there are probably many grannies who will die as a result. Would you argue that waving my wand is not a positive change because specific people exist who will be harmed?
If you're going to accept Jesus as a good human teacher, but not accept that he actually taught what the gospels say he did, then you have a good teacher but no teachings. And maybe that's a position that a lot of people like, because it leaves them an empty figure into which they can pour whatever teachings they personally favor, but I think it's rather a cop-out. (A steelman version would be: "I think he was a good human teacher, but no reliable record of what he actually taught survives, so we cannot claim that any particular teaching or position has his stamp of approval." But I still think that's weak. If you can't trust the record of what he taught, how can you trust the record that he was a good teacher?)
Accepting the gospels, the liar you describe is still offering people eternal life, at a price - "take up your cross and follow me". (The cross was not just a burden, it was an instrument of execution.) If the eternal life isn't there, it's hard to describe that as a benign or beneficial lie. Note that many of his followers were executed. (Our record of that doesn't depend on the gospels - Tacitus also says this.) You may say that this still falls short of Lewis's description, but it's far from your description. (I'd have to go back and reread Lewis's argument to see how tightly he has boxed people in on the "liar" branch.)