A Christmas tree is a Christmas tree — it’s not a holiday tree
And it's not an Eid tree nor a Ramadan tree. There's no confusion here. It's a Christmas tree and, truth be told, has nothing to do with the event Christians celebrate, to-wit, the birth of the Savior, anyway. It's just a freakin' tree.
So when will the powers-that-be object to Islamic holidays with equal fervor?