I think there is something that is very important to point out in this discussion. There is a difference between saying that goyim get punished for doing x,y,z, and saying that they won’t have a cheilik in Olam Haba if they do x,y,z.
Earning a cheilik in Olam Haba is a very specific reward that one only gets for performing certain actions. When I said that I am under the impression that goyim are not entitled to dispension based on ignorance, I was referring to the Cheilik in Olam Haba (and not necessarily to punishment). I have no idea if it applies to punishment or not.
I did hear from a Rav of mine that even if a goy is not entitled to a cheilik in Olam Haba, he still gets a reward for the Mitzvos that he performed. In other words, a cheilik in Olam Haba is the term for a specific form of reward, but one can still receive some form of eternal reward even if he is not entitled to a cheilik in Olam Haba. I was very relieved when I heard that since I always felt bad for goyim who have done some very good things but messed up on one of the 7 Mitzvos b’nei Noach (whether knowingly or not).
I don’t remember what the source is for that, although I may have it somewhere, but I do know that there was a source.
Golfer, while I appreciate your trust in me, I can not guarantee that the CONCEPT of Tinok shenishba as a concept does not apply to goyim (although I am fairly positive that the term itself does not make sense, but that is semantics).
However, I can guarantee that what I wrote in this post about goyim receiving a reward for their Mitzvos is correct.