I think there's a significant difference between the two kurfuffles.
The Christmas tree has over the years become a nearly-universal symbol of a seasonal holiday. The 10 commandments, on the other hand, though admitedly part of the basis of Judaism, Christianity and Islam, are still an overtly religious set of laws.
As for relevancy, I suspect the particular Christmas (I'm starting to understand how the short-form, X-mas, came into being) tree in question was there, well, just because it symbolizes that most of us have a few days off.
Christmas Tree Vs. 10 Commandments
The Christmas tree has over the years become a nearly-universal symbol of a seasonal holiday. The 10 commandments, on the other hand, though admitedly part of the basis of Judaism, Christianity and Islam, are still an overtly religious set of laws.
As for relevancy, I suspect the particular Christmas (I'm starting to understand how the short-form, X-mas, came into being) tree in question was there, well, just because it symbolizes that most of us have a few days off.