User blog comment:Misry6/Pure Evil Removal Proposal: Frozen II's Villain/@comment-1396848-20200115055744/@comment-24834541-20200115073513

That's indeed what Runeard said before slaying the leader and forcing the war on the people. But there's also the line they can never be trusted, and that he wants to know their strength and size. The point isn't that he wants to broker some marriage where he is the unquestioned benefactor. The point is that he views the Northuldrans as a threat to his power, and the fact that he builds that damned dam and kills the leader/starts the brutal battle upon the slightest question evinces it's much more about eradicating this perceived "threat".