Gov. Patrick agrees it’s a Christmas tree
Please see this other story from neighboring Rhode Island that may be found earlier in The Coracle here. Yep, all religious accouterments actually have meaningful and accurate names like Koran [not "happy holiday book"], Menorah [not "really cool holiday candle holder thingy"], and Wheel of Life [not "happy some kind of Eastern religion holiday device"].
Seriously, if anyone in government has that big of a problem with it, just don't put up a tree.