These were previously peasants still under feudal lords. Before somebody came to teach them under the communists, nobody cared if they were educated, or whether they lived or died.
This neo-John Bircherism masquerading as argument will always ignore the millions victims of tyrannical royals, or capitalist oligarchs in order to assign every death under communism as a death caused by communism. It's not even intellectually dishonest, it's not intellectual at all.
If Stalin didn't kill enough people for you that you still feel the need to inflate the numbers, it's an indication of how many murders you're willing to excuse for your preferred system: "We only killed 50 million!"
For a salient example, see the "60,000" protestors killed in Iran. What's a few exploded schoolgirls in comparison to that?