Do you people just not grasp the concept of religion? Religion isn't about holidays. It's about believing in a god or superior being. It's not about hunting for eggs or opening presents from under a tree. Just because you celebrate the holidays, that doesn't make you half of a religion. When you truly believe in two religions and attend both of their church/temple gatherings, then you can be half of a religion.
I know people that don't celebrate any holidays. Does that make them half Jehovah's Witnesses?