Oh that's a natural response for a catastrophic event, and yes. Your warmongering General did try to weasel himself out of being killed when he started saying "And if I surrender?"
http://cs.uesp.net/index.php?game=sr&formid=0x000d1e04
He begged the Stormcloaks to spare his life.
It's a natural response to being under attack by a Dragon that hasn't been seen for thousands of years? Wouldn't the correct response be fleeing to safety or hiding if one cares only for themselves?
Commanding to get the innocent civilians to safety just shows what type of man Tullius is under pressure and when it matters.
He's a Military General, he wasn't trying to weasel himself out of being killed, as the file states
'a mostly hopeless question, but one that must be asked'
He was beaten at that point, majority of his forces destroyed. Every General would ask that question in his position, to secure terms for their men.
So you admit that Tullius knew that the Thalmor was behind this civil war... What does he do? He kept on giving entertainment to his elven masters. He indirectly provided aid by pissing away much resources to deal with the Stormcloak rebellion.
He has no choice, Ulfric forced the Empire's hand when killing Torygg. Tullius being aware the Thalmor are behind it doesn't change anything, this land is part of the Empire.
Yes my solution is to give Skyrim to Ulfric
Why because they're too stupid to figure out the Thalmor are behind the unrest? Ignorance should not be rewarded.
but must sign an agreement to become allies of the Empire, and must provide aid to them in the incoming Great war.
Really? Do you honestly see that happening? Allies with the Empire, now that is funny.
It took the near end of the world to agree to a temporary truce. Ulfric is going to sign treaties with the Empire now? There is a lot of dialogue from Ulfric that would say otherwise to any sort of deal with the Imperials.
If Ulfric breaks the agreement at any given time the Empire would be allowed to retake Skyrim, and Ulfric would forcefully be dethroned. I think it's a fair trade. This would benefit a lot of people, even the Empire. This would null the the white gold concordat, and the remaining units of the Thalmor would be chased out of Skyrim, and Talos worship would open again. How is that bad?
The Stormcloaks are Anti-Empire, they're not willing to talk to Imperials. It took the threat of Alduin for a temporary truce. Neither side is willing to meet each other or speak peace at this point in time.
What kind of message does the Empire send, if they reward those who threaten their authority? Imagine all the Warlords and bandits, who then decide "You know what, I want a little kingdom too."
If Tullius provided Ulfric with such valuable information, and pleaded with him to end the war, and was ignored... then I would sympathized with Tullius that much, and my respect for Ulfric would cease to exist.
Ulfric doesn't care what the Empire says.
"As always, the Empire's fine words are worth nothing!"
So Tullius has to plead with Ulfric?
Tullius:
"You realize this is exactly what they wanted."
Galmar:
"What who wanted?"
Tullius:
"The Thalmor. They stirred up trouble here. Forced us to divert needed resources and throw away good soldiers quelling this rebellion."
Ulfric:
"It's a little more than a rebellion, don't you think?"
Galmar:
"Heh."
Looks like they ignored that 'valuable information'.
Are you really defending that, that, Matriarch of tyranny and all things evil? Well besides the point that the Silver Bloods send their thugs after you, Maven has you killed, under the Jarl's nose if you even cross her, and its not always by Black Sacrament, oh no, she can make it much much worse, so bad that it make's the Dark Brotherhood look like Saints. Keep that in Mind please.
Silver-Bloods use Forsworn assassins, and kill people in the streets. Right under the Jarl's nose. That and they enslave populations.
Silver-Bloods and Black-Briars are just as bad as each other.