We'll call it a Christmas Tree, deal with it.
You see, in YOUR opinion WE need to change to "include" you.
Nope, you change.
Why does it need to be renamed after all these years to being called a Holiday tree? What's the impetus?
Think about it.
To be more inclusive
December is not owned by Christians, there are several religions who celebrate a holiday in December. Saying "happy holidays" and trying to include everyone in public celebrations, that are paid for by everyones tax dollars, isn't a bad thing.
I can already see the outrage if instead of putting up a tree, some city officials decided to put up "happy Ashura" signs and give all the school kids a day off for the Muslim holiday.
Are you drunk?