Merry Christmas indeed!
For those who preach on Christmas, we try to stay to the text and not rely on recent century lore to flavor what the Bible reads as.
There's no indication there was a star that blessed night shown to the shepherds though every nativity scene has one. The shepherds were instructed, accordingly; “And this will be a sign for you: you will find a baby wrapped in swaddling cloths and lying in a manger” (Luke 2:12). The star was shown to Magi (Matt 2:2) who came later to see the child and since Herod ordered every 2 year old and younger to be killed, that gives biblical reference to the timing of the star.
There is no mention of a barn, or a cave, or any other more recent cultural narrative in the Bible. There's mention of a manger and so we preach and teach on that alone.
Most of these points are well known to theological historians. That's where I learned them from. Church Fathers like Justin Martyr, Irenaeus, Augustine, and many more have wonderful writings about that blessed birth and they refer to the place being a room in a general sense. There may be some on this forum who enjoy historical theology as I do and this is a research project on that exegesis;
http://www.hypotyposeis.org/papers/Carlson%202010%20NTS.pdfIt's not meant as argument in the secular sense. Arguments in theology are to be done in civility and with earnest grace.
Which was first shown to us by Christ.
Merry Christmas,
Mark