It's a pretty damn accurate depiction of Pearl Harbor. Complete with the Japanese reasoning for the attack.

It's certainly a December movie, but I wouldn't call it a Christmas movie.

No.

No, but Eyes Wide Shut is a better alternative to Die Hard.

Nope

No, but I think that it's one of the better war movies out there. Not a lot of emphasis on action, but you'll learn a lot about the decision-making that went into Pearl Harbor, and having people from both the Japanese and American side working on it was, I think, a good idea. Helps keep it from devolving into a simplistic morality story.

EDIT: Note that it was made before American historians figured out that Mitsuo Fuchida had a tendency to self-aggrandize and wasn't always terribly accurate. The bit with Fuchida arguing for a third wave of attacks woudn't be in a modern Tora! Tora! Tora!.

https://youtu.be/tQAacfslueQ

The only Christmas movie worth mentioning.