Children are free moral agents and have a right to be exposed to a range of beliefs well beyond the rigid doctrinal confines of their parent's faith, and we have an obligation to insist that they be so exposed, at least in public schools, if not elsewhere.
There are lots of research, of course, saying that a vast majority of us have been exposed to racial biases and stereotypes and, to some extent, we've internalized them, because that's so ubiquitous. That's why I'm so bored with the conversation about who's a racist and who's not.