What Is Wrong With Christmas Customs?

However, I have two sources that say trees were attached to ridge polls.

Personally I also have some knowledge about the traditions in my cuntry.

This is a forum in the english language. I would like a ref in that language.

In the 4th century, the early process of Christianization of the various Germanic people was partly facilitated by the prestige of the Christian Roman Empire among European pagans. Until the decline of the Roman Empire, the Germanic tribes who had migrated there (with the exceptions of the Saxons, Franks, and Lombards, see below) had converted to Christianity.[1] Many of them, notably the Goths and Vandals, adopted Arianism instead of the Trinitarian (a.k.a. Nicene or orthodox) beliefs that were dogmatically defined by the Catholic Church in the Nicene Creed.[1] The gradual rise of Germanic Christianity was, at times, voluntary, particularly among groups associated with the Roman Empire. From the 6th century, Germanic tribes were converted (or re-converted from Arianism) by missionaries of the Catholic Church.[2][3]

why do you think my ref is incorrect?

Arianism was before the fall of Rome, and just as society had the Dark Ages from volcanic activity, so the Pope referred to the Dark Ages as being surrounded by Arian bishops.