I'm an atheist, and I celebrate Christmas. no Jesus involved. same for most everyone I've ever met.

I'm talking about the name of the holiday having religious origins. Can't call the holiday Christmas without there being a Christianity.

that's like saying "I invented the light bulb! therefore, if it exists anywhere else in the universe, they stole it from me!"

That's a false equivalency. We're talking about word origins not inventions.

And maybe the story is translated from another language, and the term 'Christmas" was substituted so modern western children would understand the context.

Bro, this is Dr Seuss. What are you on about?