The Russians understand that intentions can change quickly. Assume that Europe and the United States have only the most benign intentions. The Russians know from their history how quickly intentions and even capabilities change. Germany was weak, divided, and barely armed in 1932. By 1938 it was the prime military power on the peninsula. Both intentions and capabilities shifted at a dizzying rate. Russia remembers this and other affairs, like the Crimean War. It must assume the worst, as the worst usually happens.