You realize that the Soviets attempted to ally with the western allies before the Molotov-Ribbentrop was signed - only to be turned away, correct?

From your linked article: "The offer of a military force to help contain Hitler was made by a senior Soviet military delegation at a Kremlin meeting with senior British and French officers...The new documents, ...show the vast numbers of infantry, artillery and airborne forces which Stalin's generals said could be dispatched, if Polish objections to the Red Army crossing its territory could first be overcome.

It's not surprising Poland didn't want hordes of Soviet troops in their country in 1939. A worry proven very correct when the Soviet Union and Hitler invaded Poland mere months later.

What kind of liberal ahistorical knots are you twisting yourself into?

You don't need to carry water for the Soviet Union. As stated above, it's clear why people didn't like the Soviet Union then and don't like Russia now. Again, just look at the Russian invasion of Ukraine in 2014 and the Russian invasion of Ukraine, again, in 2022 for some glaring examples of why people don't like Russia.

Stalin planned... The new documents, copies of which have been seen by The Sunday Telegraph.

Comrade, this is bullshit evidence of a bullshit plan from a bullshit source.

But even if that were true, they didn't. They happily invaded Poland and went on invading until their best buddy turned on them.

USSR pulling a victim card in the ww2 was brilliant and they got to keep entire Poland and much more.