I agree with most of that.Its just that I feel strongly that the information provided about the Eugenics Wars in TOS and ENT indicates that it was an overt,worldwide,alliance - counter alliance kind of conflict whose events would have been on the front page of the paper daily.
That was implied in "Space Seed," but the specific dialogue doesn't absolutely rule out an alternative interpretation. After all, the EW novels don't say that everything that happened was secret -- they just say that the reasons behind a lot of publicly known events were not understood until generations later. So the public could've known about a variety of conflicts and violent acts but not understood what was really driving them behind the scenes.
And remember, history isn't the past, it's merely an interpretation of the past. "Space Seed" isn't a primary source for the Eugenics Wars, only for how 23rd-century historians interpret the Eugenics Wars. History isn't always an accurate account of the past.
For example this would include common knowledge of the the very existence of the eugenic supermen/augments but in Gregs books this is also a secret.
There's actually nothing in "Space Seed" that clearly says the tyrants were known by the general public of the time to be Augments, as opposed to being recognized as such by later historians. Take this passage:
SPOCK: I have collected some names and made some counts. By my estimate, there were some eighty or ninety of these young supermen unaccounted for when they were finally defeated.
KIRK: That fact isn't in the history texts.
SPOCK: Would you reveal to war-weary populations that some eighty Napoleons might still be alive?
I'd say that makes it explicit that at least certain key details about the Eugenics Wars were indeed kept secret from the public of the time.
The thing I think I like the most about Enterprise is that it firmly establishes the Eugenics Wars were overt and took place in the 1990's!
ENT does establish that there were overt wars, but not that the existence of the Augments was public knowledge. As I said, the EW novels don't say that the conflicts were completely unknown, just that the reasons behind them were. Events that the public took as isolated acts of terrorism, civil wars, disasters, and the like were actually parts of a larger phenomenon that historians didn't recognize until after the fact. It's true that the novels suggest less open warfare than ENT indicated, but I still say the interpretations are reconcilable if one reads flexibly and assumes the novels only told part of the story. It's certainly easier than reconciling "Space Seed"'s ethnically diverse superhumans with The Wrath of Khan's twentysomething Aryans over 15 years later.