I know this is way late....
BR25, you didn't win that discussion. Coming from being a witness, you can't understand that not all Christians think alike about every single issue.
There's a difference between Halloween and Christmas, incase you haven't noticed(you just see them as holidays as the same).
For a Christian, Christmas involves honoring Chist, the gratefullness of his birth for our salvation. This is scriptural whether you want to believe it or not.
Halloween is not scriptural, so some might partake in the festivities of it...or they might not. some don't like the scary-ness of Halloween, but they like the candy, and fun costume side of it...it all varies a little.
You need to search the biggest reason for the beginning of Christmas, instead of thinking it was all just a bunch of Pagans in their false god celebrations. It was begun to bring the non-believers, to Christ. The Church leaders just used creativity to get the job done, period. Want to talk about origins? Don't get me started. Are you familiar with Egyptian Pyramids?......