Salesmen: Because the Government is trying not to offend people and changed the name of the tree.
Christian: For what? Those people don't celebrate Christmas! Fuck them! It's a Christmas Tree!
Created as an alternative to a Christmas Tree where only Christian traditions prevail in a community where Christianity is not law or establishment.
Usually loathed by Christians that take it as being unnecessary. They somehow believe the United States is a Christian nation. They are usually the same religious bunch that take offense to other religions being publicly displayed by government or corporate entities.