Sure. There was no choice. The hatred towards Vix in the north is large enough. What HM does beyond warring Perdan is irrelevant cause had Vix not aided, they'd be next no matter what.
You flipped, fine, but can you please stop making it sound like you flipped for the betterment of Vix or FG? 
You want Perdan dead, fine, but others not agreeing with that and choosing their allies is not a bad decision. Maybe in terms of lands...but there are so many other factors at play.
Never said it was for the bettermer of Vix or Fallangard. Nor did I say it was a bad decision for Vix to oppose us.
It was, however, a bad decision for Fallangard to do so. They alienate a realm that cared for them in favor of a realm that treated them like dirt. Meanwhile, they get the worst of the pressure from the war effort, and may very well die. In the end, their sacrifice will be pointless, it'll have been but a speed bump that gives the North an extra city to fund the war against Vix and Perdan, which it wouldn't have had if they'd at least have stayed neutral.
By attacking and looting Highmarch, they made all the worst decisions, regardless of their motivations, because they'll fail at everything. They end up with no realm, no friends, and no accomplishments, all while helping those they chose to oppose by handing them more regions.
