When this woman is upset with her BIL, she asks Reddit:
For the past 3 Christmases, I (F) always give everyone fruit preserves. I make homemade marmalade and jam of all kinds, it's one of my hobbies and I even sell them online. I try to only give people one's that are made from fruits that they like. I only give them to adults I get the children different things.
Last year, my sister got engaged and married to a man, "Kevin". Last Christmas, Kevin complained when I gave him and my sister a box of jars of different kinds of fruit preserves for Christmas.
He said that it is tacky and trashy for me to give them as a gift in front of the whole family. It was very embarrassing. He complained in front of the whole family. He complained about the gift itself.