Heck, how much do you even know about crusification or where the idea of the Christmas tree comes from? let's take an example of blasphemy:
interpretation of Deuteronomy 21 by the Temple Scroll reflects Jewish priestly halakhah (legal interpretation) from the early second century BC to the fall of the temple, which ordains that the one who is guilty of national treason or blasphemy shall die by being hanged upon the tree. A sinner of this kind should be killed in the most awesome way, by being hanged on the tree before his people (whom he has betrayed) and before God (whom he has blasphemed).
this dealing with hanging from trees most likely came from common beliefs and traditions surrounding "sacred trees" that often dealt with beliefs in dealing with death.. For example the thorn olive branch crown to mark a King.
www.ethnobiomed.com/content/3/1/28
Abstract:
The differences between Muslims and Druze are related to the latter's belief in the transmigration of souls. On the subject of sacred places, Turner [[1]:24] states: "This place where other realms are meet is also indicated by various forms representing a link or connection between the human and transhuman spheres, and usually set in a vertical dimension as a ladder, poles and pillars, trees and hills". Sacred places are found all over the globe and may consist of various artificial objects (buildings, shrines, graves) as well as natural ones (mountains, water source and trees).
And the practice of crucifixion and hanging on trees goes back to Egyptian practice of hanging cursed people. :
Smith's Bible Dictionary say under Crucifixion:
Crucifixion was in used among the Egyptians, Ge 40:19; the Carthaginians, the Persians, Es 7:10; the Assyrians, Scythains, Indians, Germans, and from the earliest times among the Greeks and Romans. Whether this mode of execution was known to the ancient Jews is a matter of dispute. Probably the Jews borrowed it from the Romans. It was unanimously considered the most horrible form of death.
Genesis 40:18-19 we read the interpretation of the dream by Joseph(P). It is talking about the 'Pharaoh' in Joseph's(P) time will hang the person on a tree.
"This is what it means," Joseph said. "The three baskets are three days. Within three days Pharaoh will lift off your head and hang you on a tree. And the birds will eat away your flesh." [Genesis 40:18-19]
The New International Dictionary Of The Bible confirms that (Under 'Cross'):
Crucifixion was one of the most cruel and barbarous forms of death known to man. It was practiced, especially in the times of war, by the Phoenicians, Carthaginians, Egyptians, and later by the Romans. So dreaded was it that even in the pre-Christian era, the cares and troubles of the life were often compared to a cross.[2]
Now the most primitive form of crucifixion was on the trees as the on-line The Catholic Encylopedia states under Archæology of the Cross and Crucifix:
The penalty of the cross goes back probably to the arbor infelix, or unhappy tree, spoken of by Cicero (Pro, Rabir., iii sqq.) and by Livy, apropos of the condemnation of Horatius after the murder of his sister. According to Hüschke (Die Multa, 190) the magistrates known as duoviri perduellion is pronounced this penalty (cf. Liv., I, 266), styled also infelix lignem (Senec., Ep. ci; Plin., XVI, xxvi; XXIV, ix; Macrob., II, xvi). This primitive form of crucifixion on trees was long in use, as Justus Lipsius notes ("De cruce", I, ii, 5; Tert., "Apol.", VIII, xvi; and "Martyrol. Paphnut." 25 Sept.). Such a tree was known as a cross (crux).
Yep, Your symbol the cross is also intended as a visible threat than just simply a symbol of your religion. It's meaning bears deep into the history of the religions in that part of the world. It also gives you a more clear understanding when you hang ornaments on your tree or put the star on top of the tree.
But lets go deeper:
And btw, this is also from the Egyptians:
20 built on the foundation of the apostles and prophets, with Christ Jesus himself as the chief cornerstone. 21 In him the whole building is joined together and rises to become a holy temple in the Lord. 22 And in him you too are being built together to become a dwelling in which God lives by his Spirit.
This has a lot to do with how the Egyptians ruled, and their beliefs in dealing with the Pyramids.. The chief corner stone is the top of the pyramid often represented as the all seeing eye. It's considered unseen governance from above (the heavens) to the people below. This is taken from the Egyptians.. The chief cornerstone of the pyramid is same symbol for Horus, the Egyptian god and savior. It's the same concept stolen and used by Christianity.
I will even quote someone else:
The chief cornerstone of the pyramid is same symbol for Horus, the Egyptian god and savior. Like the Egyptian pharoah, Jesus was called a shepherd who rules the nations with a staff. Horus was a popular Egyptian god who was the son of Osiris and Isis. Osiris and Horus were both solar deities. Osiris was the setting sun, Horus the rising sun. Jesus is the rising Son and the morning star. The pharoah was considered to be an incarnation of Horus (also known as "Amen-Ra," the sun god).
And you can read all about Horus here:
www.sacred-texts.com/egy/ebod/
And if you need a bigger hint.. here you go:
The light of the body is the eye; therefore, when thine eye is single, thy whole body also is full of light; but when thine eye is evil, thy body also is full of darkness. Luke 11:34
This is the day night cycle of the sun GOD. The all seeing eye which the sun represents the eye of the day, and the moon being the eye of the night. This deals with the two eyes of horus with the left eye (the "Eye of Horus") often being regarded as the symbol of the moon and the right eye (the "Eye of Re") being that of the sun