Mlyn, I know that we celebrate our Saviour's resurection around the same time as Passover. I think the tie is obvious, there... as in the Blood of the Lamb. And Christmas is around the same time as Hannuka.

I don't think we're hiding behind these and personally, I don't see why Christians can't or shouldn't also celebrate the Jewish holidays. I would LOVE to if I had a Jewish friend that could help me with it.