This by far is the #1 most common argument I get regarding defending Christmas and its Pagan roots. It also is the easiest to refute.
To be honest, you shouldn't be refuting anything - you have said that your only reason for posting is to explain why you CAN'T do Christmas. You have done that.
You are making a false equivalency argument.
No I'm not; I'm asking a question. Which is, why do you require Christmas to be mentioned in the Bible in order to celebrate it?
That's my question - which has not been answered.
My opinion is that we don't. We don't need a command from God to celebrate Christmas/Easter/Palm Sunday - just as we don't need a command from God to use computers, musical instruments, prayerbooks or anything else. These latter things are aids to worship, while Christmas is the name given to the feast day on which we celebrate the birth of the Son of God. If you don't like aids to worship and don't need a special festival to remember Christ's birth; don't use them.
The Bible reveals God to us, his love, his salvation, his Son and his will for our lives. It is not there to dictate our every move.
Here is what I claim to be a false equivalency argument:
A: Birthdays celebration are pagan
B: use computers/guitars/hymn books/visual aids to worship Christ is secular (pagan).
C: Therefore, if we can't celebrate birthdays, we shouldn't use computers/guitars/hymn books/visual aids to worship Him.
Well this argument doesn't work, or even, I think, make sense.
1. Birthdays are not pagan.
2. using visual aids in worship is not secular. Jewish worship was full of visual aids; sacrifices, incense, the ark of the covenant, the holy of holies, the lamp of God etc etc. The prophets very often acted out their messages from God - e.g building a model of Jerusalem and then destroying it, to represent the warning that the city would be destroyed; walking around naked, burying a linen belt and so on. Hosea was even told to marry a prostitute to symbolise the relationship between God and Israel. And God used something visual to get Moses' attention - the burning bush.
Worshipping God with musical instruments is not secular; it's in the Psalms and they used them before the dedication of the temple.
3. C doesn't make sense because, unless you are a JW, there's no reason why we can't celebrate birthdays. But as your first two arguments are wrong, your conclusion is bound to be.
I state that because A and B only have passing similarity, and that only A has a Christian holiday dedicated to it, the two are false equivalent.
Again, I wasn't making an argument; I was asking a question. I was also pointing out that your argument doesn't hold in other areas.