We've all heard the idea that there exists two selves, the self that exists in your own mind, and the self that exists inside the perceptions of others.
Intentionally created 'tulpa' must be similar to the emulations of so many people I've closely interacted. The ones that exist lurking in my subconscious mind. Instantiated via my intuitions of how they'd respond to a question, or wondering what gifts they would appreciate.
How about in dream characters. Is it wrong to murder dream characters, and should we strive to lengthen dream time to give them all a longer more fulfilled life?
Even the morality of sci-fi brain emulation is murky to me. Let alone the type of emulation we all do unconsciously ourselves. I'd have to hear a very convincing argument to separate tulpas that say "hi I'm here and alive!" from dream characters that do the same thing, or other illusions like chat gtp.
The Operation Bernhard example seems particularly weak to me, thinking for 30 seconds you can come up with practical solutions for this situation even if you imagine Nazi Germany having perfect competency in pulling off their scheme.
For example, using tax records and bank records to roll back peoples fortunes a couple of years and then introducing a much more secure bank note. It's not like WW2 was an era of fiscal conservatism, war powers were leveraged heavily by the federal reserve in the united states to do whatever they wanted with currency. We comfortably operate in a fiat currency regime where currency is artificially scarce and can be manipulated in half a dozen ways at the drop of a hat.
The way you interpret Operation Bernhard seems to me like you imagine the rules of society as something we set up and then are bound to like lemmings. When in reality, the rules can be rewritten at any time when the need arises. I think your example is equivalent to saying the ability to turn lead into gold would destroy the gold-standard era economy and utterly wreck civilization. When we know in hindsight we can just wave our finger and decouple currency and gold at a moments notice.
I suspect many of the other rules and systems that hold our civilization are just as adaptable when the need arises.