I found a racist social media comment from my coworker

Without going into a great amount of detail, I was scrolling through social media when I came across a news segment talking about a local political party whos entire platform was built off of denying genocide occured against my race and trying to dismantle any official acknowledgement of this fact.

I opened the comments, and was shocked to see a comment saying (to paraphrase) "I'm going to get hate for this but oh well! I agree with them, what happened happened but they need to move on." Not complete agreement with the denialist rhetoric, but acknowledging the genocide and saying it should be erased, to me is even more disgusting.

My family was killed in the violence that she is flippantly saying should be denied. I dont know what to do. I am the only one of my race in my workplace and I think it will be obvious who it was if I share this with management.