You should read the Thalmor dossier concerning him to discover his true nature.

It can be found during the main campaign.

Yes, he's dealt with the Thalmor before, so what? They have a mutual....interest. While I am an Imperial sympathizer, I can see why they would deal. Ulfric wants a free Skyrim, and so does the Thalmor. They help each other out, and they both come out on top. The only question is, who will survive the aftermath? Once the Thalmor get what they want(which is what Ulfric wants), they will have little use for him and dispose of him. That is my understanding of their relationship anyways.

Done.
He made the best thing possible out of a horrible situation, fooled them in a false sense of security and is about to kick their asses.
I admire the man.

Thalmor are [censored] bags, ulfric is gonna send them to the bottom of the frozen sea when he get after them

The Empire has made deals with the Thalmor as well...What's your point...?

maybe you should read the dossier before acting like you know what it says, and maybe you should learn soemthign about the nature of thalmor/altmer/aldmeri dominion scum, they would never work with "low class scum" (how i know they would put it) like ulfric or any other human. ulfric is very anti-thalmor

Ullfric is a puppet

Don't think the Imperials feel comfortable next to the Thalmor. The Gold Concordat is the calm before the storm.

Yes they have. They were forced and had no alternative.

Indeed, Ulfric is a puppet and the Imperials are slaves of the Thalmor.

I'm calling bull...Hammerfell didn't have to submit to the Thalmor. If the incompetent Imperials had a better leader, they wouldn't have had to submit, either.

I'm not sure if you guys are just being sarcastic, or if you don't have the slightest idea what "being someones puppet" means.

That he...the avenger and guardian of mankind is sth like a Thalmor "sleeper". For the Empire dealing with the Thalmor is just a reasonable policy.

Yeahhh...Not sure what it was you were trying to say there...

The Imperials were at the brink of collapsing, so were the Thalmor when the Great War ended. A peace treaty had to signed... that could benefit both factions. Of course the Imperials were "forced" because they had no alternative. This is why i like the Imperials, they see the bigger picture unlike Ullfric.

What bigger picture?
Even if they win a second war, it's a giant waste of lifes for something that could have ended in the first war.
The empire had still a lot of unused troops, which they only needed to draw together from the untouched regions.

They sacked the Imperial City. The Thalmor were close to picking off Imperial leadership. Hammerfell didn't have the same circumstances. You weren't supposed to take the White-Gold Concordat seriously. The Empire only signed it to regenerate to ready up for round two. This whole Stormcloak rebellion defeats the entire purpose of signing the Concordat. If the Stormcloaks had shut up about it, we'd be halfway to Summerset Isle.

Perhaps, it you who doesn't see the "bigger picture"...The Thalmor started to rip at the Empire in 4E 20...Yet they did nothing. 71+ years later, still the Empire doesn't take care of the Thalmor, they lose Elsweyr. The Empire already lost Black Marsh as an ally soon after the OB Crisis, yet do nothing when they lost Valenwood and Elswer. Another 71 years after losing Elsweyr to the Thalmor, the Imperial finally decides to stand and fight, but only after the Aldmeri Dominion is at their doorstep. The Empire's lack of vigilance played a hand in their own downfall. Had they acted sooner, reclaimed lost provinces and made a joint-attack with their remaining allies, they could have beaten back the Thalmor before they let them dig in to too deeply in Tamriel. Now they are forced to sign the WGC, a "treaty" which is actually the Thalmor's initial ultimatum that they gave Titus Meme II in the first place.

Correction; The Thalmor want an EMPIRE free skyrim, not a free skyrim
OR to put it bluntly the thalmor want an empty skyrim so that they can march in.

LOL..."round two"?? The WGC was no peace treaty..It was a "time-out" for both sides. It was actually the same ultimatum that the Aldmeri Dominion gave Mede II four years before the Great War ended. Do you honestly think the Thalmor are stupid enough to let their most hated enemy regroup and build their ranks again, giving them a chance at beating them? No. The Thalmor have been planning this for far too long. Also, the signing of the WGC is in favor of the AD, anyway. The Imperial alliance is broken...They lost Valenwood, Black Marsh, Summerset Isles [Alinor], Elsweyr and Hammerfell...The Thalmor have Valenwood, Elsweyr, Alinor and Pyandonea backing them. Even if the Empire DID rebuild their ranks...They still have to fight atleast 4 Different nations with only a handful of allies. Face it, the signing of the WGC was the signing of the Empire's doom...it's exactly what the Thalmor wanted in order to gain the strategic advantage.

Let's not forget that the signing of the WGC has severed all political ties with Hammerfell -- one of the Empire's greatest allies.

So did the Thalmor. To what end though? More needless bloodshed?

Ullfric thinks about Ullfric. The Thalmor could use someone like him to keep Skyrim busy while they plan on an invasion. The Imperials have their hands busy quelling the rebellion let alone worry with the Thalmor. If you have read those documents at the Thalmor Embassy you will come to know that he was made to believe that the reason for Talos' worship to be banned was issued by the Imperials and not actually the Thalmor. They fed him lies while he was captured. So what's his first move? He murders the High King.

Ullfric has his own agenda, he wants to be crowned king at any and all costs. He thinks the Imperials are the reason behind this religious offspring. This is why i called him a puppet, because that's what he is. Would you follow a racist leader? Unless you're role-playing, which i assume you are and rightfully!

It all becomes clearer when the Imperials themselves have nothing against the worship of Talos.

Exactly! You do see the bigger picture

If you read my words you'll notice that i haven't said anything that goes against the argument you just made. And well made by the way

Yes indeed! That's the whole thing.

Yep, Ulflric was a good man that let his emotions over rule his judgement. Doing this, he put his countrymen and the empire at risk. He played right into the Thalmor's plans. He would have made a very poor starfleet captain, lol.