Holiday trees?!?

What are "holiday trees?" what holiday do you celebrate with one? Let's see, Christmas has "Christmas trees" independence day has "fireworks" thanksgiving- turkeys. President Obama is having a holiday tree, but what holiday is he celebrating?
A friend of mine says "Obama is sending a strong message of inclusion" since when was Christmas, and the use of a Christmas tree "exclusive?" Christmas is a christian holiday, but is celebrated all around the world. Even in times of war, fighting would stop on Christmas day. This new enemy that the world faces has changed everything! So now we have an apologetic president who is bending over backwards to try and please an enemy that doesn't care. Mr. President; announcing that you won't celebrate Christmas with a Christmas tree will not appease their hatred for us. It only makes you look like the fool you are.