The answer most of you will get is true in nearly every sentence, and the word covenant is not in it. A dare, the paragraph it produced, and what was standing in its place before any of us got here.
There were no Jews at the Council of Nicea. That absence was not an accident; it was decreed by one empire, defended in the emperor's own letter, and enforced for centuries. What the severance cost, who carried the thread anyway, and why the whole record is evidence for Yeshua, not against him.
Yehoshua accepted every name that described work he was doing and refused every name that would have frozen that work into a chair only one person could sit in, which is why calling him a rabbi hands him both an office that did not yet exist and one of the three titles he explicitly declined. The refusal was a governing rule about how his people would organize themselves rather than a gesture of modesty, and the movement that preserved it abandoned it within three centuries.
Christianity says Yeshua lived a perfect life as a substitute for yours. Read tamim in Hebrew and a different picture appears: not a spotless record waiting to be transferred, but a whole man shown to you. A word study, a doctrine with a birthday, and the question almost nobody asks about what the life was actually for.