Yeah, "college educated" white voters tend to be more democratic. Because real prolonged exposure to people not like you, can reduce biases and preconceptions. Not always, but can.
There's a sleight of hand that happens though, where folks extend this to think that because college grads earn more than non-college grads, that poor, uneducated white people are more racist than rich, educated white folks. This is demonstrably not true, and is a very unfair insult to poor white folk.