It's worth noting that:
1) This exhibit has been open to the public for almost a year (October 2017), and nobody has had a problem with a white woman playing a role in procuring and curating artifacts until just recently.
2) There's nothing that I can find that suggests Ms. Burnside is THE curator of the exhibit as opposed to A curator. The idea that she is THE curator comes from Rasta's poorly made OP that is based entirely on some random dude's outraged tweet that a white woman is working in hip hop history and is hardly well sourced. I did find mentions of another person mentioned to work alongside Ms. Burnside when it came to artifact procurement, whose job title is "curator": one Dr. Kevin Strait. He is black, if you're wondering.