In this case what I mean is taking pagan concepts and retrofitting them to the new religion.

As I said, I've largely made my peace with this, since a simple look at history shows that pretty much every enroaching culture does this with aspects of the older culture.

But I find I'm still having the urge to growl, "Get your own damned holiday!" Which is generally how I think of Jewish holidays - as being very specific to Jewish history and culture.

Did I mention that my reactions here are largely visceral and I make no claim to logic whatsoever? :)