Great cast but sadly that's about it. And even that is wrong since the age gap between actresses playing mother and daughter is just too small. Ok, kudos to the set design, music, costumes and makeup...
Military references sound like written by somebody who doesn't understand a thing about war and soldiers.
There are meta references trying to make fun of the Christmas movie genre, but they just miss the point/are not funny enough to justify some stereotypical plot decisions. (Ok, maybe the one when they walk in the snow wearing just thin jackets, no hats, scarves or gloves and he asks her if she isn't cold and she says that yeah, she is very warm was a bit funny).
And even their Jesus references are so pompous and stiff that they didn't manage to tie him to Christmas!
And how come we're supposed to believe that American soldiers who fought in WWII are still out and about.
No real feelings, no reflection, just reciting stereotypical lines - I know that plenty of people, especially religious and military related use those ready-scripts in their real life but that works only in the inner circle, not when you're trying to make your 'cause' interesting to the outside world.
The cherry on the top: there is absolutely no romance chemistry between the main characters. I wonder if that's the main actress just holding back because she wants to be seen as a good christian wife in her private life.
So yeah, despite the dialogues being so full of moral righteousness, everyone in the movie seems to be selfish, focused on their own agenda, manipulative or calculated...