I was standing in front of the ice cream in the Stop & Shop when I got shouted at by a former student, enraged, hopping, eye-popping at my mask. He was a house painter, but there was not a spot of paint on his clothes today. Instead, he had a cart with milk, Cheerios, Huggies, broccoli, two loaves of Arnold White bread, and one canister of grated parmesan…