Interracial relationship/mixed baby

My little family and I went to a circus with my sister the other day. My sister took lots of pictures and posted them on Facebook. You can clearly tell my babygirl is a mixed baby because shes way darker then her cousins..well this lady commented on my sisters picture and asked "Who is that little colored baby? Someone in the crowd?" my heart sank! I couldn't believe she would even ask someone that. I got super offended and started balling my eyes out. I know there is still a lot of racist people out there as I am in a interracial relationship and we hear stuff all the time, but I guess I was kinda hoping my daughter wouldn't have to go through it. 😭