Genocides are typically directed at a specific people for ethno-religious reasons. The Holomodor wasn't specifically directed at just the Ukrainians.
Had it been, I suspect we'd be living in a very different world. The Nazis would have found natural allies with the whole of Ukraine, not just a small group of fanatical antisemitic ultranationalists.
The majority of Ukrainians, like all other peoples of the Soviet Union, fought bravely for the Soviet Union as a whole. Had there been a deliberate famine against such a crucially important nation, just a few years before the start of WW2, I doubt Ukrainians would have sacrificed themselves in such numbers as they did fighting Hitler.
Snyder is one perspective on a complex matter. He wrote an excellent book, but not everyone agrees with his conclusion.