The motivation of the German and French governments was that German and French banks not suffer. And of course the leaders of those countries cared more about their people than the people of Greece. This is natural and part of the psychology of being part of a nation. We ended up with things like:
https://www.reuters.com/article/us-eurozone-greece-warships-...
At any rate, both parties are at fault and both parties ought to have suffered. From my perspective only one party suffered.