I've seen a lot of anti-semitism in my life, and grew up as one of the only Jewish kids in my class. Mostly it's just in the form of jokes, but sometimes more.
On my street growing up there were lots of kids. My next door neighbor was Jewish, and we were friends, so I wasn't lonely, but I really liked this one set of sisters who lived down the street. Occasionally they would play with me, but more often they would leave me out.
This was over 30 years ago, and one night recently I was talking to my mom about our friends on our street growing up, and those sisters came up. My mom said, "Maybe you didn't even know, but they weren't allowed to play with you because you were Jewish."
I was so shocked. I had never considered that a possibility.