Weird/rude things people have said to you that you randomly think of

Sometimes, I randomly remember this Vietnamese classmate from when I was like 7 or 8 years old. China and Vietnam have had conflicts and tensions, and this boy said something around the lines of, "It's you and your family and China's fault that Vietnam suffered." Like, why you brought me and my family into this, it's not like we're involved. My parents haven't been there for decades except for visiting, and I was not born in China. I still don't know how to feel. He was a little kid, so I could forgive him, he probably hear his parents talking or saw the news they were watching. To this day, all I think is, "what the hell was that?"