"one could expect a somewhat elevated level of people who are opposed to religion"
Oh dear. Please reread that sentence slowly and try to consider how it might seem, to someone who doesn't agree with you, for you to claim superiority on that account. It might surprise you that Muslims, Jews, Buddhists, Christians, Atheists, Sikhs, Agnostics and others can be found at any point on the scale of learning from illiterate to professorial.
As to the quote of timeless ancient wisdom within the article, I found it amusing, agreeable, appropriate and illuminating. Appropriate because those who won't learn from the mistakes of the past are doomed to repeat these. It could of course be equally appropriate for Bertrand Russell or Karl Marx to be quoted in a well-thought out article in LWN regardless of the fact that these significant thinkers were atheists.