Yes to God alone. Attempting to apply to any thing other than God, the unique reverence, respect, honour etc. due to God alone is idolatry. The Pagans you cite are committing idolatry.
Is not FAITH the only real evidence of God's existence? ...of Christ's existence?
Christ's existence was not known to the Apostles and their contemporaries by faith ... He was truly incarnate: He walked, talked, breathed, ate, slept, woke, worked, performed signs among them. His life, ministry, death, and resurrection was and is a matter of objective, physical reality. We know about it by eyewitness testimony. That is the evidence of Christ's existence. As for the existence of spiritual God ... there's plenty of material and philosophical evidence to suggest that He exists. See St. Thomas Aquinas' famous "five proofs for the existence of God" ... I think they fall a bit short of positive proof, but certainly suggest that belief in God is not unreasonable. That Jesus of Nazareth was and is God ... that's a matter of revealed knowledge ... of faith.
For that possibility alone, he has been reviled and insulted.
Nonsense. He was reviled for doing bad science.
. All of these relics are mere distractions from what is true and real.
Says you. Others find them to be useful reminders of what is true and real. As I told the other fellow: If you find them bothersome, avoid them.
God is. Christ is the corporeal presence of God as he is the Son of God and the Holy Ghost.
That looks a whole lot like a heresy called "modalism". We Christians believe that God exists in three distinct Divine Persons, revealed to us as The Father and The Son and the Holy Spirit. The Son, Who exists eternally as do the Father and the Holy Spirit, took on human nature and became incarnate. By doing so, He became the "image of the invisible God", as St. Paul reminded the Colossians. The Father sent His Son as the perfect icon of God ... any mere material icon is a reminder of the reality of the incarnation ... a reality unknown to the Jews of Moses' time (obviously). It is a reminder that "the Word was made flesh, and dwelt among us". It is a reminder that "God so loved the world that He sent His only Son ..." Some folks seem to me to be very uncomfortable with the earthy, material, physical reality of the incarnation. I don't know why.
A question you yourself should consider answering.
No, according to your own personal interpretation of the Bible.
You of course are welcome to it, but fat lot of good it's going to do anyone else.