This is so corny it makes my day.
Imagine at the end one soldier discovers in his pocket a
and the other a
and both smile.
I remember reading an article about this years ago where they said that after the truce - the following day - both sides were reluctant to start firing on each other again and it went on for some time. Although I've read a few articles since, I haven't been able to find another reference to that since, so assume it was just dramatized for effect.
Now that Christianity has been totally fucked up, I can't imagine what would bring the SJWs and conservatives out of the trenches to share a moment together if it eventually leads to civil war...
Merry Christmas and Happy New Year!