Anonymous wrote:I love dogs. Love them. LOVE. But how can you get mad with someone who says don't bring your dog to my house? That is peak entitlement
Exactly. And then to henceforth change the entire celebration without input from the long-time host so that the kid gets his way after all. Sorry OP, your nephew and your sister were both wrong. Of course it's ok for you to set limits for who/what you want in your own home. It was also mean of them to change how Christmas has been celebrated all that time - it's like a slap in the face to your hospitality. They could and should have handled both parts of the problem (dog at your house this Christmas, what to do about the future) more kindly.
I'm not a dog person myself, and one thing I've observed about people who are is that they seem to think the ruckus is adorable on a par with parents who find every goofy thing their toddlers do adorable. They seem to truly not be able to comprehend that not everyone is comfortable around their special animal because to them they are SO AWESOME. He seems like the kind of dog person who is as aghast as if you had told him he couldn't bring his child to your gathering.
Pets may certainly be beloved and that is wonderful. But your beloved pet is not everyone else's beloved pet. It is ok to have gatherings where only humans are invited, for goodness sake.