[kawaii]

There are cetainly new testament things which supercede the Jewish religion which misinterpretated many things. I would certainly argue that the New Testament definition of the Saints supercedes Old Testament misunderstandings.

[hosepipe]

The word saint in the new testament original language(not Latin) merely means "holy one" or "the holy ones".. Holy in the Hebrew sense of the word.. The Greeks had no corresponding word for holy in the Hebrew sense/language, one had to be invented..
What makes them holy?.. i.e. saints..
The Blood of Jesus.. Not a declaration by some other human..

NOTE: In new testament times they did not call each other christians but "holy ones"/"saints".. Non believers called them christians.. they called each other holy ones/saints..