It makes sense out of context, but when looking at the show as a whole, the northerners do come off as a bunch of idiots. Here's a brief run through of the overall attitude of other Northern houses in the SHOW ONLY:
+From the start, we are introduced to the idea that the North is culturally and actually somewhat ethnically different from the south. There is a clear division between the two, and the Starks are the principal window into Northern culture and ideals.
+The North is very willing to straight up go to war when Ned is captured. However, we get a sense that the Northern houses are very proud and the Umbers threaten to abandon Robb for the mere fact that they would have to march behind another house. Regardless, the GREATJON becomes one of Robb's greatest proponents and initiates the whole King in the North thing. The North is now in full out open rebellion due to their desire to independently rule themselves due to the vast differences between themselves and the southern court.
+Robb is successful in battles, yet draws ire from Rickard Karstark due to keeping Jaime alive while his sons were killed. Karstark snaps, and then Robb executes him, which leads to the Karstarks marching home. This is a big crack in the idea that the North is always fiercely loyal. Maybe the Karstarks are just assholes (they are).
+Bunch of dudes get slaughtered in the Red Wedding. We don't really know what other major Northern houses have victims at this point. The Boltons betray the Starks and in turn get the North.
+Boltons express the worry that if any Starks are alive, they could be used as a catalyst to rise up against the Boltons. This conveys the idea that the Northern houses are just naturally loyal to the Starks, or at the very least hate the Boltons for betraying them (understandable. I'd also hate the dude who murdered my family).
+Ramsay marries Sansa in order to further legitimize and stabilize his rule over the North. What's the point of this from the Bolton's POV if there wasn't this idea that the Starks were the true leaders of the North and that no one really liked the Boltons? You could argue that they just want to keep a leash on Sansa so no one can use her I suppose, but in that scenario she doesn't really need to be married to Ramsay at all.
+Despite the apparent fear of Northern houses turning on the Boltons, no one decides to join Stannis. Literally no one. So the Boltons were basically paranoid over nothing. The Boltons easily win.
+Once again, Roose is still concerned that without Sansa, the North will rise against the Boltons. Karstark Jr. even says as much when he reports that Sansa is going to Castle Black. Roose also scoffs at the notion of killing the Lord Commander because every house in the North would rise against him for such an affront to Northern traditions. Roose is then immediately poisoned by his enemies.
+When ZomJon and Sansa try to recruit houses, no one wants to join. Glover says its because their decision to march with Robb only lead to Northern deaths and the Boltons helped them take back their castle. So is Roose Bolton an idiot? The entire idea that the North could rebel against him at any moment is assuredly false since Jon gets almost no one to help him out. Smalljon is also an asshole who hated his father for no reason.
+When Snow retakes Winterfell, all the Northern houses are like "I'm sowwy" and proclaim Jon KING IN THE NORTH. So the Northern houses go from wanting to be independent, to thinking it was a dumbass idea, to thinking "Hey, we were right the first time!" They are the biggest bunch of flip floppers, they should just be called House Croc.
, but I think Lena Headey is better, all the actors are fantastic in this show really, which is surprising giving how many kid actors they have.