I fully expected a PC response about how her boyfriend should open up to the wonders of a secular Christmas--the general line fed to us by the media. I was pleasantly surprised by her response. She gets it. Christmas is a Christian religious holiday. And if you want Jewish kids, you raise them in a Jewish house--celebrating Jewish religious holidays.
There is also the issue of disrespect to Christians. Having had a few devout Christian friends over the years, and having spent a year living with a very devout Christian, I cannot help but think that if I were Christian I would find this practice of non-Christians appropriating Christmas as a non-religious holiday a bit offensive. Think about it. Christmas is the the day in which believers celebrate the birth of Christ and the birth of their faith, a new era and so on. This is one of the holiest days in the Christian calendar, no? How can it possibly be respectful to effectively say "Yeah, well, I think your religion and your version of G-d is so much bullshit, but hey, I'll take the tree. And the gifts."
Something just seems....off....