In my job I sometimes receive gifts from vendors. One December our vendor sent each of us a gift from a florist. It was a centerpiece created from pine branches and those shiny glass balls used for Christmas tree ornaments, clearly intended to be used at Christmas dinner. I'm Jewish. I thanked the vendor and gave the gift to a coworker who didn't do business with that vendor.
Honestly what you have described just sounds like an ordinary winter flat-surface decoration to me! Unless the balls said "Merry Christmas" or had pictures of the nativity scene on them, I wouldn't necessarily think of them as being Christmasy as much as just seasonal!
But the season is Christmas. Between pine branches (as if from a Christmas tree) and ornaments to be put on a Christmas tree, it reflects the Christmas season.
There are people of other faiths who do choose to celebrate the secular Christmas season (snow, snowmen, poinsettias, etc.) if they don't celebrate the religious aspects. However, assuming that someone of another faith is happy to celebrate the secular parts of Christmas is a pretty big assumption.
Accidentally hit "disagree" when I meant to hit "agree," and I don't know how to fix it.
I think that this is very well put. I know it's hard for people to understand, especially because many non-Christians do do some Christmasy things, but this kind of thing makes many of us feel uncomfortable. No, it's not "offensive," and it's not pushing religion on anyone, and, yes, of course we understand that the intentions are kind and a gift is a gift, at worst a slightly tone-deaf one. But it often still feels like pressure to assimilate to the dominant culture, irrespective of any religious content. Secular vs. religious simply isn't the point. I know people are trying to be inclusive, and in their favorite holiday at that. But many of us would rather be appreciated for who and what we are than being told that Christmas is "everyone's holiday," so we should join in.
In fact, I am delighted to be invited to attend, as a guest, a friend's religious celebration than being expected to join in a general secular celebration myself. To me, a poinsettia looks Christmas-y, even though of course not religious. I would not be comfortable decorating my home with them -- or holly or shiny balls or reindeer or Santa or any of the other secular Christmas items.