Can you say "Establishment of religion"? 

Or perhaps the person that maintains this page will also post holiday messages for other faiths, such as Eid Milad ul-Nabi on December 24, 2015. 

The City of Glen Rose should not be using  a government page to promote religion. Any religion. 

Note that the City of Glen Rose TX is listed, on Facebook as a government organization, and the *Impressum* says that it is the Official Facebook page for the City of Glen Rose, Texas. 

Oakdale Park, whis is also owned by the city, and for which Glen Rose citizens pay taxes, put up the Nativity scene on their Facebook page. 

and despite the fact that Christmas is celebrated by a whole lot of people as a secular holiday, including all the pagan rituals, as well as Santa, (and if Jesus existed, he most certainly was not born on Dec 25, which is a pagan celebration date), the City feels the need to push a particular religion, AS IF the City of Glen Rose is a church and not a secular local government.

Incidentally, excellent discussion from the Baptist Joint Commission on myths about separation of church and state. Here's one.

We Baptists often hold up Roger Williams’ “hedge or wall of separation between the garden of the church and the wilderness of the world,” and point to Thomas Jefferson’s 1802 Letter to the Danbury Connecticut Baptist Association where he talked about his “sovereign reverence” for the “wall of separation.”

But we sometimes overlook the writings of the father of our Constitution, James Madison, who observed that “the number, the industry and the morality of the priesthood and the devotion of the people have been manifestly increased by the total separation of church and state.”1

Even Alexis de Tocqueville, in his famed 19th-century “Democracy in America,” a work often cited by those who would disparage separation, writes favorably of it:

“In France, I had seen the spirits of religion and freedom almost always marching in opposite directions. In America I found them intimately linked together in joint reign over the same land … [A]ll thought that the main reason for the quiet sway of religion over their country was the complete separation of church and state. I have no hesitation in stating that throughout my stay in America I met nobody, lay or cleric, who did not agree about that.”2

from where I wrote about this in 2009- For a Secular christmas.