I grew up, and went to grade school, in a very white, very Christian part of Middletown, OH. I think there were no more than 5-10 jewish kids who went to school with me, and there were probably less Catholics since they were all in parochial schools. I remember, sometime around the third grade, finding it sad that the jewish students had to perform in Christmas programs while no one paid at least a reference to Hanukka.
My mother, to her credit, was one of the parents who opposed an attempted coup when I was in fifth grade to remove from Wilson School its first black teacher, Hattie Holmes, who taught me French and whom I loved. Still do. I never went to school with a black student until I was in junior high school.