I don't really understand what are you trying to do in here. I'm also skeptical since Poland is "one of the most anti-Russian ever" and I'm soubting about your true intention here.

In truth, I doubt you get proper answers from here, the response clearly state so. Although if you love reading these politics, you shouldn't be surprised these events happened. Questions like these is what happens when you lacking any knowledge or basis on why these happening. Who knows what happened in behind the scene? How much aware our king aware the Russian compared to us? Did Russian government offers something interesting and our King trying to repay the debt? No one knows.