By this subgoal stomp, do you mean that when their subgoal (Killing Jews) became a priority, that it diverted resources away from their supergoal (world domination, or at least the domination of Europe/Asia), and thus they stomped on their own supergoal by irrationally promoting the importance of the subgoal?

If that is what you mean, then I think that a strong case could be made for this, as a lot of manpower was sucked into that particular void.