The headline in the link and topic title is misleading, as it's about "pure" reason.
He's talking about "pure" reason, not reason wholesale. But what he does is worse - he racializes the whole topic. Yes, Kant and Descartes' view on reason is wrong, but it's not their whiteness or culture. It phrases the issue as though philosophers are merely products of society's norms. I'd agree that, say, Kant has had a negative impact on society, but to go on to make it about white males is a cop out for a real criticism of pure reason.