I was brought up to view Christmas as a magical time, but a time above all for giving. Getting together as a family (grandparents cousins, aunts, uncles) because it's one of the few times that the family does get together. Making sure no-one is left out. Learning to enjoy yourself and have a happy time with others even if your home is full of relatives, or you spent an hour on Christmas morning travelling to other relatives who don't make the bread sauce and brandy butter quite as well as your mother.
Nowadays on MN "family" means "me, DH, DC" and Christmas is all about receiving and not giving. "You have a right to spend Christmas in your own home". Everything centres around making it perfect for the children, without any thought of modelling for them the qualities of thinking about other people.
AIBU in thinking this not only makes life more unpleasant for older relatives who are excluded or barely tolerated, but that it also bodes ill for the future, in moving society more towards "it's all about me" and less about taking responsibility as a society for the welfare of all its members?