I have heard/read that same thing about Native American parents, and I can't argue with you about the dangers of drawing attention to yourself as a people. It sounds like this community is well aware of their vulnerability. It's possible Preacher Brown stressed the wrong things in his practices and sermons... I don't know, but running to Jonas Collier was incredibly stupid. He showed no caution, and found out the hard way that Enniskillen was no better than anywhere else, and being righteous is wasted on the hateful, racist, bigots of the world. Loving your fellow man doesn't apply to them.
The wee girl told her pa... not one of the white folk. She may have been taught the ways of right and wrong, but also not to keep things from her father. Just saying. I absolve her of her actions--consider her an innocent here--but, like you, not her father. I really don't think she has anything to feel guilty for no matter what happens, though I know saying that doesn't mean she wouldn't blame herself. She shouldn't be made to feel that way, though.
The way I see it, the father thought he would have an ally in the other father, one who would help him ensure his son's safety by preventing any further contact, but he was wrong. I believe he knows that now, and is fearful for his son. "if she's allowed one" really hit me hard. I appreciate this kind of thoughtful input and perspective. It helps me 'see' a little better.