Very rude, and disrespectful

The principle or whatever she was rude when I went to pick one of the kids I transport, she told me to leave asap, I wasn't even there for 2 minutes because apparently they were busy with a function or whatever it was for the staff. However, there were other parents there not just me but she singled me out and told me specifically to leave. I have no idea why they were so disrespectful and extremely rude because it was crystal clear that the other parents were also there to pick up their kids and that none of them were invited to their stuff function either. However, when I looked around I realized that not only was I the youngest amongst the parents but I was also the only black girl there among everyone. No one will really know why they had such a terrible attitude towards me specifically but it was clear that my presence offended them, it wasn't the first time they were so rude to me initially I just ignored them but that was the final straw. It's a pity