Sadly that does appear to be the case in many places but not all. However, if we go with your assessment here as the standard these days, please explain then why the word "Christmas" and/or the Christian imagery (angels, stars, wisemen, nativity scenes, etc.) are so offensive and/or threatening to those who demand that they be kept out of sight or that they not be apparent in public?
Are you referring to the efforts to not let local governments set up such scenes? If you are those are annoying because it's a government endorsing a religion which should not be done. No one's going to be aggravated if you put up a nativity scene in your front yard.
I would agree that taxpayer money should not be spent for such purposes ever. But no I am not speaking of that. I am speaking to those who would deny carolers the right to sing traditional Christmas carols in the town square because that is public property. I speak of those who would demand the government remove all Christmas imagery, artwork, etc. DONATED to help decorate the city or city hall or the county courthouse or whatever. I speak of those who would deny the townspeople the right to put up the creche on the courthouse lawn--one privately built with private funds--that had been there for decades.
How is allowing the people to use their own commonly owned property for such purposes endorsing any religion? Especially if all people of other religions are afforded the same privilege to acknowledge their traditional customs and heritage?