In before the HaMmEr AnD sIcKlE iS tHe SaMe ThInG aS a SwAsTiKa fascists in disguise pop up.

These baltic states were just vassals of Germany and once were part of Russian empire till 1918 when Lenin signed the Brest treaty and gave up a chunk of lands to German protection. Western Ukraine was also taken away by Poland I guess. So in Molotov pact they just reversed it with some assurance that USSR will not attack if Nazi Germany attacks Poland . I remember I didn't know that baltic States were under Russian empire until I watched an old video of Putin angrily replying this to a Latvian journo in early 2000s. Why Baltics have strong Nazi memories is due to that only, they were nazified with German influence.

Even with respect to treaties with the nazis, the USSR only signed after the west refused to attack, refusing an offer by Stalin to field a million soldiers against nazi germany.

The west was hoping the nazis would take out the USSR, which is why they all signed non-aggression pacts first.

Ouch, that is bound to ruffle some feathers