> it is widely accepted that Molotov-Ribbentrop pact was a necessity

What horrible russian propaganda! The pact was about splitting Europe. That's why Russia invaded Poland[1], the Baltic countries[2], Finland[3], and Romania[4] after signing it.

[1]: https://en.wikipedia.org/wiki/Soviet_invasion_of_Poland

[2]: https://en.wikipedia.org/wiki/Occupation_of_the_Baltic_state...

[3]: https://en.wikipedia.org/wiki/Winter_War

[4]: https://en.wikipedia.org/wiki/Soviet_occupation_of_Bessarabi...