The history of Poland goes much further back than just "Hurr Durr, StALiN GiFtEt iT!".

The first ruling dynasty, the Piasts, emerged in the 10th century AD.

Here is a Map of Poland from 1757. Stalin was born over 100 years later. But, yeah, I'm sure Vladimir has a very selected view on history.

Further more the Polish–Lithuanian Commonwealth was a real threat to Moscow and in 1610 even occupied Moscow.

Sigismund III then initiated a policy of expansionism, and invaded Russia in 1609 when that country was plagued by a civil war known as the Time of Troubles. In July 1610, the outnumbered Polish force comprising winged hussars defeated the Russians at the Battle of Klushino, which enabled the Poles to take and occupy Moscow for the next two years. The disgraced Vasili IV of Russia was transported in a cage to Warsaw where he paid a tribute to Sigismund; Vasili was later murdered in captivity. The Commonwealth forces were eventually driven out on 4 November 1612 (celebrated as Unity Day in Russia). The war concluded with a truce that granted Poland–Lithuania extensive territories in the east and marked its largest territorial expansion. At least five million Russians died between 1598 and 1613, the result of continuous conflict, famine and Sigismund's invasion.

This Putin guy really was bad in school, bad at his KGB job in Germany and is now really bad at leading his mafia-state of a country. Imagine being such a failure in Life.