Totally a TAAT and goady and not really AIBU 
But the annual Why do Non-Christians celebrate Christmas threads have started early this year. Possibly due to global warming or Brexit.
Mid-winter celebrations predate Christianity. Bringing light and green in, feasting, presents, family gatherings, mythical gift-givers and so on all exist outwith Christianity.
Going to church, the nativity and a star on stuff are Christian so fill your boots with those. In April though, not December, because that's not Christian either. If we are just using our own traditions.
But I like celebrating stuff. I get fed at Eid, Hanukkah, Christmas and anywhere else anyone wants to feed me. So can't we all celebrate whatever we like without calling each other hypocrites?