With all the PC nonsense and the MSM/Hillary/Obama ginning up all the hatred, I’m not surprised this happened.
Who knows what this is, right now.....
If Jihad, the target is similar to that in Paris (Bataclan theater) and Manchester - infidels having a good time.
If BLM - it’s white folks having a good time.
If something else, like someone with a specific connection to the country music event (less likely) then the suspect range is broader.