A few days ago a well-renowned German economist, industrialist and a former owner of a multinational company Vorstandschef der Thyssen AG, Dieter Spethmann, published an open letter addressing the German politicians to open their eyes on the events in Ukraine. He first tried to publish his open letter in Frankfurter Allgemeine Zeitung, but was declined. He published his letter then in Geolitico:
UPDATE May 2023:
WebArchived article in German (original link, no longer working)
Below is an automatic translation using Yandex translate: