I think it is very funny, if the Poles want to be offended, let them be offended. It would be like being offended watching Borat.
Actually, the Kazakhs felt offended after watching Borat. Just like the Slovaks were offended after “Hostel”. It's just the way it is in the world, that countries without well established image, like those tree mentioned before, want to be perceived by the rest of the world as a normal country rather than a backwater one, where all inhabitants are either stupid, racist or a bunch of murderers. UK, France, Germany don't need to worry that people might actually believe that the jokes told about them are true as their position in the world is basically well established and people just know better. But Poland, Romania, Hungary, Lithuania? Note the case I’m afraid.
Polish in the country take offense to this. American Polish have a bit more a sense of humour about these things. It's a very big difference in cultures we live in. In the states we constantly crack on heritage, but in Poland they see it more as an insult. Most Polish here also don't get the American jokes about stupid polish inventions. It is not something they really know about here.
I think it's high time to abolish these myth that Polish people don't laugh at themselves. One of my favorite polish comedy is "Dzień Świra" and it definitely isn't about Germans, Brits or whatever. We don't have problems with laughing at ourselves. We just don't like when other people laugh at us as very often it isn't meant in a nice friendly way.
As for the commercial, what's up with t the Russian accent of the lector (actually not only lector, but also the word na zdrowie is pronounced in a Russian way. Kurwa is OK though :) ) and with the he Russian song in the background? Confusing. It's stil funny tough. :)
Any vodka fans tried Alchemy?