Good advice on Christmas moderation.
I agree that there are other Christian groups that are against Christmas. I would argue, however, that such opposition to celebrating Christmas is not the historical Christian position but surfaces about 500 years ago and are based on a faulty reasoning: that a history showing some sort of use of a custom by non-Christians means it's somehow tainted. Just as meats offered to idols (as discussed by the Apostle Paul) incurred no lasting taint and could be freely eaten (except for possibly stumbling others) so customs that have new meanings but were once connected to other religions (such as wedding rings, etc.) are not inherently tainted either.