Don't pay attention to this comment by this obvious Russian propagandist. (See his previous messages)

Estonia was first invaded by Soviets, then Nazis, then Soviets again, because even though Estonia didn't want to participate in either side, Soviets said not choosing a side means choosing enemy's side and they used this as an excuse to invade a fully-independent country.

Also, see https://en.wikipedia.org/wiki/Molotov–Ribbentrop_Pact for how Soviets and Nazis planned together the invasion of baltics and Eastern Europe.