I don’t do Christmas either, so perhaps I can understand some of your feelings of exclusion. But don’t you think this is a little over-the-top.
I went back to your posts to see what threads you were talking about since you didn’t link them and found this post. Not only do I not know who you’re addressing, I also don’t know which other thread you’re talking about. Either way, wow!
If people are really pushing your buttons that badly with this, perhaps you could explain more explicitly why it bothers you or link to where you have, but I’m not seeing the reason for the upset here.
And a question: are the people who are wishing you a Merry Christmas wishing other people the same thing? Are you expecting other people to make exceptions for you and remember to do so when they don’t for others? Do these people that you’re complaining about know you personally and well?