President of Poland died in a crashing landing en route to a ceremony of 70 years anniversaries of Katyn. Also died, General Chief of Staff, and commanders of Polish Army, Navy and Air Forces.
Retrospective looking, people die in wars, and soldiers die faster. However, rarely had a occupying country attempted to wipe out the entire elite class of the occupied land all together indistinguishably. Even Japanese who took no regard of human life and dignity, had some appreciation of culture and art.
The only other occurrences of these kind of mass elimination only happened by Communists Russians to Russians, Communists Chinese to Chinese and Communists Cambodians to Cambodians.
Probably Polish shouldn't hate Russian people, because Russian People had suffered far more themselves before and after Katyn.