Maybe they're still stuck in 1930s mentality. Back then, Hitler really did want to invade Russia (and did), along with Poland and a bunch of other countries.
However, the world has moved on in the last 80 years. Germany is part of NATO now, Poland and Germany are friends (and France, Netherlands, etc.), and no one is worried about invasion from Germany any more. Somehow, the people of Russia never got past the mindset they had back when Hitler tried to invade.
Maybe. Or maybe they’re assuming everyone else is itching to invade and subjugate Russia, because Russia would and continues to do so to all their neighbors at the slightest opportunity. They can’t conceive that the rest of the world really has moved beyond such idiotic imperialist behavior.
However, the world has moved on in the last 80 years. Germany is part of NATO now, Poland and Germany are friends (and France, Netherlands, etc.), and no one is worried about invasion from Germany any more. Somehow, the people of Russia never got past the mindset they had back when Hitler tried to invade.