Matt Heimbach is a well-known white supremacist.
His parents disowned him and have made it clear that they never taught him that shit.
White supremacy and racism is not just something taught to by one's parents. It's a function of American culture and history that everyone is susceptible to.
Fact is, we don't know where this chick got this shit from. Maybe it was her parents, maybe it was her friends, or maybe it was the Internet- I mean, are we not all aware now of the mind of white supremacist recruiting happening online due to the alt-right? Why would white women be immune from it?
We need to stop putting this kind of shit on the parents all the time, especially when we don't know the life of a racist, because it deflects from how deep this shit really goes.