I knew a kid in high school who came up to me almost every single day and told me with a big smile that I was going to hell because my people killed Jesus.
Then one day, he came up to me and looked a little sad and said, "we got a new pastor at my church. He says Jews are the chosen people and you're going to heaven."
I didn't think it was worth ever telling him I didn't believe either place existed.
And while we're on school, my daughter's right wing fuck of a sixth grade teacher just started to my daughter about Jews and Judaism unprompted one day. My daughter is half-Jewish, doesn't ever talk about it, and she's an atheist. She was really confused how she knew. I know exactly how she "knew." She took one look at me, saw the nose and the hair, and made a lucky assumption. I might as well have come in with a yarmulke and prayer shawl.
And although I cannot prove it, I suspect that's why she started getting singled out for little things here and there that other kids weren't singled out on at all. I had definitely been in that position with my own teachers, so maybe I was being too sensitive on that part, but it felt like it.