1. You provided no evidence in any of the 12 categories.
2. Yo provided no link between you 300 year start date and anything that ever happened previously.
3. Your last misstatement indicates you do not understand the evidence of transmission.
If you ever find actual evidence that connects the apparently CULTIC practice to Christian truth, please do ping me. I’d like to know what you find.
“2. Yo provided no link between you 300 year start date and anything that ever happened previously.”
It is in the Apostolic Creed, for which we have evidence (from the Church fathers), describing the doctrine going to around the time of Chalcedon.
Arguing that you do not like the evidence I provided is one thing (because it doesn’t fit your arbitrary rule), arguing that I provided no evidence whatsoever for the doctrine is quite another.
The strongest scriptural evidence in favor of the communion of Saints is the fact that Christ himself proclaimed (when speaking of Abraham), that God was not a God of the dead but of the living. He argued that Abraham, though he had died, was presently alive.
I see no scriptural evidence for your position that saints are dead, and in fact, I would argue that’s contrary to the hope that Jesus christ provides of eternity with Him.