Amid an interesting story about the increasingly acrimonious relationship between Poland and Russia, now mediated via Poland's more pro-Russian partners in the European Union, a Wall Street Journal article (subs. req'd) has this quote --
"Why [take a tough line]? We need to have easy access to the vast reserves of gas that are located in Kazakhstan, Turkmenistan and the Caspian region, which are separated from us by Russia," Piotr Wozniak, the economy minister in charge of Poland's energy policy, told reporters in Warsaw on Friday
Which, barring the possibility of invading Russia, sounds like a reason that you'd probably want to be nice to them.