Family dislikes chosen baby name - excuse is offensive.

StalkThis
Im at a loss at the moment. My husband and I chose both a boy and girl name for our unborn child, shared the names with my stepmom today and not only was she rude about it, continually saying she didn't like the boy name "Jasper" and the baby would be bullied but then she stated "your child is not African American"! She also informed me she's praying for a girl so she doesn't have to be bothered the rest of her life by this decision To ruin her grandchild a life. 
The conversation was thru text message and several hours later I still have yet to respond as I don't know what to even say. I'm upset an shocked in so many ways, my husband is in shock as well. What would you say or do?