BERLIN — Like most foreign-policy experts, I was shocked by Russia’s annexation of Crimea and its continuing “soft invasion” of eastern Ukraine. Can such a naked land grab really be happening now, in 21st-century Europe? But Russia’s actions were not the only surprise. If you have followed the German debate about the Ukraine crisis, you have witnessed another strange phenomenon: a parade of former politicians and public figures going on TV to make the case for Russia. According to these august figures — including former Chancellors Gerhard Schröder and Helmut Schmidt — NATO and the European Union were the real...