How does he not hear himself? Also, "Handelsblatt" is missing a letter. Anyway ...
I reject the premise of his letter. He seems to think the purpose of the money was to help the greek people, and offers a more productive way of doing so. That's all fine, but I'm pretty sure the sole purpose of the money was to save the Euro. Whether that's ethical is debatable, but I think it's important to remember that Greece has messed up quite a lot of things without considering how that might effect other EU member states; ignoring at least some of their responsibilities. But that's a different story entirely.
His tone is utterly disrespectful, if you ask me. I'm really not sure who he thinks he is or what he thinks he's doing, but I know for a fact that a lot of my fellow germans aren't gonna like being spoken to in this tone of voice. He mentions fear and anxiety a lot. I don't know what he means by that. We're quite calm, as far as I can tell, and I can imagine that scares him a little.
Germany is one of the riches countries on this planet. We will do almost anything to keep it that way. I appreciate that he needs to sell his own agency to his people, but if he actually believes he can control the fate of his country even so slightly, I'm afraid he's delusional.
Just for the record: I'm neither proud of nor happy about how we treated the greek people, but I'm tired of pretending this is about anything but money.