—most egregious error ...
By the end of the first century the term "Jesus Christ" had become a proper name.
The word christ is not ipso facto a name. It only assumes the form of a name if transliterated (as opposed to being translated) from the Greek word xristos, which, if translated, appears as anointed.
Had it been so translated we would not be hearing "Jesus Christ." In its place we would be speaking of Jesus of Nazareth, or Jesus the Galillean.
It is unfortunate that the word (xristos) has been transliterated. If it had been properly translated the popular name Jesus Christ would never have been so widely circulated in our midst and consequently become the cause of thousands of deaths.
The concept behind the idea of an anointed one (a Messiah or Christ) is nothing less than an affront to God, a fact that is most dramatically offered to us in the story of first king of Israel, Saul.
Then all the elders of Israel gathered together and came to Samuel at
Ramah, and said to him, “Look, you are old, and your sons do not walk
in your ways. Now make us a king to judge us like all the nations.”
I Samuel 8:4-5
This request does not sit well with Samual:
But the thing displeased Samuel when they said, “Give us a king
to judge us.” So Samuel prayed to the Lord. And the Lord said to Samuel,
“Heed the voice of the people in all that they say to you; for they
have not rejected you, but they have rejected Me, that I should not reign
over them. According to all the works which they have done since the day that
I brought them up out of Egypt, even to this day—with which they have
forsaken Me and served other gods—so they are doing to you also. Now
therefore, heed their voice. However, you shall solemnly forewarn them, and
show them the behavior of the king who will reign over them.”
I Samuel 8
We should particularly note the following from this passage:
"... the voice of the people ..." (vs 5)
"... they have rejected Me ..." (vs 6)
God assures Samuel that the people are rejecting Him by making such a request for a human king, a personage who will be anointed for that position and will therefore assume the status of Messiah. A Messiah is an anointed ruler. That is what the term suggests.
In no uncertain terms God makes it clear that the idea (of a Messiah) is not His, but the people's.