That's called a history. Some dudes work hard on it and later they don't have to worry about dangers you described and have more time for tasty Slivovitza.
We learned also (costed millions of lives and about 60 years of totalitarism of both colors) that nothing's more destructive than blind hatred (check the nice developments on Moscow-Warsaw-Berlin axis).
Bought me several flashkas of Zywiec and Okocim beer (nice 0.5 liter flashkas) and kabanosy and brushed up on my pidgin Russian with nice Russian babes in Russian Gourmet yesterday.
Good stuff.
Russian Gourmet ...Is some restaurant in some city somewhere? Maybe babes in Polski land more friendly? Who knows?