are there any resources that talk more deeply about December 25 1914
Here is a good explanation of the Christmas Truce by /u/Georgy_K_Zhukov: https://www.reddit.com/r/AskHistorians/comments/2qbd2z/can_one_of_you_wonderful_experts_please_make_us/cn4nv64/)
I also recommend checking out this book by Terri Crocker.
The Christmas Truce has been heavily mythologized. It was a short, fleeting, and quite localized event that has grown in the public consciousness into something that bears little resemblance to the actual event. Contemporary records from the British Army make only passing reference to the sporadic truces.