Everything the devil does is against Christ, that is why he always come in a way that is like Christ but it is actually Antichrist.
Christmas is a form of the name of Christ, which sounds good. It sounds like a good thing but it is not. Chistmas and the Christmas Trees is rooted in paganism.
2 John 1:7 For many deceivers are entered into the world, who confess not that Jesus Christ is come in the flesh. This is a deceiver and an antichrist.
Mark 13:6 For many shall come in my name, saying, I am Christ; and shall deceivemany.
Romans 16:18 For they that are such serve not our Lord Jesus Christ, but their own belly; and by good words and fair speeches deceive the hearts of the simple.