By the way, Katyn was Soviets killing Polish Officers, not slavs. Unless you now define Polish as a slavic nation.
“Unless you now define Polish as a slavic nation.’
You are constantly proving the adage that it is better to remain silent and be thought and idiot than to open your mouth and remove all doubt.
Perhaps before posting this you should spend 30 seconds learning what Slav means:
https://en.wikipedia.org/wiki/Slavs