Not only German. There was a significant part of the German-united Europe (including Spaniards, Romanians, Italians, Scandinavians and many others). And now they are repelling NATO-lead proxy invasion. 4th Reich, as they call it. Actually, it's a pretty typical situation - Napoleon wars, aka Patriotic war aka "invasion of twenty tongues", invasion of Sweden Empire, Polish invasion, Livonian wars, Northern Crusades and many others.
Actually, Baltic States were part of Russia since the Northern war against Sweden Empire and were part of the Russian cultural and political zone of influence since the very begging of their existence.
Actually, there was German (including Austrian) influence since medieval time. And, traditionally, there were pro-German political groups. And, traditionally, Germans just used them not for the good of Ukrainian people, but for German profit.
And it's a traditional fate of all German Quislings. The Germans use them, and then - leave.