“About 40 percent of high-ranking NKVD officers had Jewish nationality recorded in their identity documents,” writes Yale University professor Timothy Snyder inBloodlands: Europe Between Hitler and Stalin, “as did more than half of the NKVD generals. . . . The Great Terror could be, and by many would be, blamed on the Jews.”
In order to attribute a conspiracy to a group, you must first ascertain either of these two points (or both of them) to be true:
a. Anyone with the ancestry of that group (no matter how remotely connected) is connected ideologically to that conspiracy. In other words, anyone with the slightest connection by birth to that group must be working in concert with the masters of that conspiracy.
Or.
b. Anyone with the slightest connection by ancestry to the conspiratorial group must possess an innate, inborn predilection to unwillingly contribute to the conspiracy. In other words, anyone with the slightest ancestry, will unknowingly act towards the furtherance of that conspiracy by nature of his ancestry.
If neither of those things are true, then there can't be, by definition, a conspiracy involving all members of that group.
For example,
According to the source, 40% of high-ranking NKVD officers had Jewish ancestry on record. Which means that 60% of high-ranking NKVD officers were of Greek Orthodox ancestry, regardless of whether they were raised in the teachings of the church or or had any dealings with the church other than a connection of ancestry (they carry the 'Greek-Orthodox gene').
If there was a conspiracy of Greek Orthodox Russians to commit atrocities, then either a and/or b must be true.