It's a general rule that a claim gets exaggerated each time it's re-cited.
Case in point being the black book of communism. It started with moderate Hearst media fabrications, which were picked up on, expanded and exaggerated by Nazis, which in turn got exaggerated by US/UK intelligence operatives, and so on.
This is, in broad strokes, how one gets from a million or two tragic deaths during the last famine in the history of Russia and the component nations of the Soviet Union more broadly to tens of millions of dead Ukranians in a genocide of staggering proportions.