I suppose I can contribute a little something since there seem to be a few other alliances speaking for us at the moment.
To say that we don't care about an ally of ours is an overstatement. Our coalition came first. After all, DT entered the war to defend an ally (along with a couple of our other allies). It's understood that if another ally of ours ends up on the opposite side of things, they are going to be taking damage from someone in our coalition. It would be foolish of us to defend them for the sake of honor when it would be detrimental to our own cause for engaging in the war.
If NoR would have started getting dog-piled and requested our help, we definitely would have gone to lengths to help
them. It most likely would not have come in the form war (unless absolutely necessary), as the engagements on the NoR front were in the upper tiers, meaning we would have been fighting both coalitions' upper tiers at that point (and again, completely counterproductive to our initial cause... also really masochistic). To say the least, TOP, DBDC, and company were giving us our money's worth in those ranges, anyway.
Having said that, NoR never did come to us, so it seems they must have been doing ok.
And again, congratulations, IRON. Obviously, DT can sympathise with cancelling a treaty that has run its' course.