- ON INVOKING THE SAINTS' INTERCESSION TO SPEAK TO GOD ON ONE'S BEHALF...
Ps 115:17 THE DEAD DO NOT PRAISE THE LORD, Nor any who go down into silence.
Isa 8:19 And when they say to you, "Seek those who are mediums and wizards, who whisper and mutter," should not a people seek their God? SHOULD THEY SEEK THE DEAD ON BEHALF OF THE LIVING?
ON SPEAKING TO THOSE WHO HAVE PASSED ON...
Deut 18:10-12 "There shall not be found among you anyone who makes his son or his daughter pass through the fire, or one who practices witchcraft, or a soothsayer, or one who interprets omens, or a sorcerer, or one who conjures spells, or a medium, or a spiritist, or ONE WHO CALLS UP THE DEAD. FOR ALL WHO DO THESE THINGS ARE AN ABOMINATION TO THE LORD, and because of these abominations the LORD your God drives them out from before you.
"Seeking the dead on behalf of the living" and "calling up the dead" is necromancy, and we engage in nothing of the sort when we pray to the saints.
First of all, the saints aren't dead. As disembodied spirits in heaven, they are in fact very much alive: "Have you not read what was said to you by God, 'I am the God of Abraham, and the God of Isaac, and the God of Jacob'? He is not God of the dead, but of the living" (Mt 22:31-32). Abraham, Isaac, and Jacob, they died a long time ago, yet Jesus refers to them as the living ones of whom He is God. By His grace, the saints have conquered death, and I dare say are now more alive than you and I are!
Secondly, necromancy is when you conjure up spirits in order to elicit hidden knowledge from them. Catholics don't do that when we pray to the saints. "Calling up the dead" is the farthest thing from our minds. At any rate, the Catechism of the Catholic Church speaks strongly against necromancy, and sorcery, and any other type of magic or divination. See para. 2115-2117.
Basically, your whole line of argumentation is simply tearing down a straw man.
- ON PATRON SAINTS...
Lev 20:27 ‘A man or a woman who is a medium, OR WHO HAS FAMILIAR SPIRITS, shall surely be put to death; they shall stone them with stones. Their blood shall be upon them.’"
You're making way too much out of the phrase "has a familiar spirit." That phrase is simply another way of referring to a necromancer. See the Hebrew word (transliteration: 'owb) and it's definition here: Bible Study Tools.
As I have already established, praying to the saints is the farthest thing from necromancy. And now that I have given you a point-by-point rebuttal, perhaps you will respond to the actual arguments I made in my previous comments in this thread.