How is Tullius unintelligent?
If anything, he's pointing out that he can see past the curtain the Thalmor had tried to put up. He's not stupid. He may be reserved and a bit cynical, but he's not an idiot. If anything, he's quite pragmatic and his rough-around-the-edges aspect he has as a character has everything to do with his frustration at the situation - knowing that the divisions and the pouring of men and resources into the current conflict benefits the Thalmor. Dunno about you, but that would chafe my ass too.
I honestly don't know what you would want him to do. Just surrender, knowing that that also would put the Thalmor in a better position by proxy? Seriously. Tullius doesn't get enough credit, like ever. It's really too bad.
Before you try to argue now that I hate Nords, check yo'self.
I love Brynjolf, among others. A few others. But he's not a "stereotypical" Nord. And I like that. I have every problem with grunting Neanderthal types, be they Nords, Imperials, Bretons, Redguards, whatever. This even applies to real life, lol.
Man, and how did this become a debate about what I find hot in fictional pixelated game men? Relevance to overall topic, there is none.