Actually, no. The quoted event constituted the elimination of the top, within a purge with at least 20,000 killed summarily or executed. Katyn was similar in numbers in a much larger country, but it was heavily focused on army and police officers and a significant part of the elite escaped into emigration. Such purges were executed in all other Soviet-occupied countries and earlier in the Soviet Union itself, what the Khmer Rouge did was more extreme.

_{*Lunatic*, n.
One whose delusions are out of fashion.}