"Intellectuals claiming to be in the service of high intellectual ideas will show up in at least two of those (Stalin's farm purges, Mao's political purges)"

This is, maybe, a non-sequitur, but for the sake of intellectual correctness, I believe the Cultural Revolution, at least, was anti-intellectual. Mao closed down schools, burned books, and put teachers and intellectuals into re-education camps until they were ready to join work groups where they toiled in factories and fields. Mao's greatest intellectual rival, Deng Xiaoping, was held under house arrest for years. Mao promoted hard work and nationalism, not intellectualism.