Our two grandkids in this country have a Pagan grandmother (me!), Pagan parents and a Hindu grandfather, and they all celebrate Christmas with all the usual stuff - carols, angels, Jesus in the manger, etc. None of us object, and it would be pretty hard to avoid the nativity story if your kids go to school, (in our little girls' case, it is a Monetessori group run by two devout Christians), watch tv or receive Xmas cards. Sometimes, when they're belting out "Away In A Manger" at the top of their voices, their mum and I look wryly at each other and say "Christian brainwashing..." but it just makes us smile. I think that it's the same for most people of other faiths. Certainly all the younger Hindu families I know have to do Xmas, with presents and all, because their children expect it!
We live in an extremely multi-cultural city and we've got a huge Xmas tree in the city centre and another outside the football ground, and there is always a crib alongside the other decorations in Town Hall Square.
Anyway, the Christian Church nicked the winter celebration from the Pagans and today is Yule, so Happy Winter Solstice!