Crow, to me Kosovo is Serbia, the very least northern Kosovo, and a good amount of Poles feel this way too. However, Poland is doing NATO's bidding by accepting Kosovo's statehood. What was done to Belgrade in the 90s by NATO is the reason why Russians don't like the US to this day.
At least of lot of country's support Serbia in this regard - green is countries that recognize Kosovo as independent, gray is not (as of May 2008).
They should've stayed with Serbia - the Kosovar economy is in shambles... but that's discussion for a different thread.
I actually found a cool link on that same numbeo site that discusses Poland and terrorism - threats are low according to their statistics- sources vary from Wiki to the UN and US Census Bureau - take it for what you will...
Keep in mind Poland use to have an issue during Communism of plane hijacking which would now be thought of as a terrorist incident/attack/etc. Basically, people would get on a plane and try to force it to land in a non-Communist country like West Germany, Austria, etc. This actually happened quite a few times.
Poland hijacking element independent