I confess, I'd tell my relatives to get stuffed and find somewhere else to do Christmas.
My parents don't have, and never have had, a television. They're not making a big deal out of it, and these days they take advantage of having a free license (over 75) and watch not only iPlayer (doesn't need a license) but occasionally live TV (strictly speakingdoes) on their laptops. I'm to this day not entirely clear what their objection is: I think it's just that they've never quite got around to it, and every year that goes by without doing anything about it reinforces the position.
However, when I was a child, I recall relatives point blank refusing to visit at Christmas (my parents lived far enough from their respective families that any visit required at least one overnight stay) because they wanted to see the Morecombe and Wise Christmas Special or whatever. Pre VHS, pre-iPlayer: if you missed it, you'd missed it. I think they had a point: you're entitled to play "my house, my rules", but that doesn't mean that anyone else has to play it with you.
The same goes for people who are ostentatiously tee-total, alcoholic, don't eat until 11pm, turn the generator off and go to bed at 7pm, insist that everyone arrives in fancy-dress, want to debate the merits of the second Vienna School with everyone bringing an essay to discuss and a prepared piece to play on the provided musical instruments: you're entitled to be eccentric, but you're not entitled to be offended if people don't want to spend Christmas with you.