Yes we should. If I believed that the grace was given in fullness to our dear sister in the lord Mary exclusively and a unknown remnant to all others. And after death (no life) somehow or other I would suffer somehow for another unknown amount of time .
I would think someone shedding the light of the gospel could give them a hope and the idea of patrons saints as workers with familial spirits would be driven out by the living words of the law found in the Bible (sola scriptura) The bible calls it a abomination
If I believed in the foundation of necromancy worshiping or what they call venerating removing themselves from the idea of worship . Which is simply one of the manners as venerable. Those who lord it over another beliefs. They must seek their approval.
2 Kings 23:24 Moreover the workers with familiar spirits, and the wizards, and the images, and the idols, and all the "abominations" that were spied in the land of Judah and in Jerusalem, did Josiah put away, that he might perform the words of the law which were written in the book that Hilkiah the priest found in the house of the Lord.
Isaiah 8 builds on that doctrine that exposed necromancy . Rachel hid them image idols (teraphim as household family gods ) Isaiah 8 uses the word "seek" twice. The first
necromancy seeking after the dead. And the second seek, seek after
God who gives life to those dead in their trespasses and sin as the fullness of Grace . Not a remnant as Catholics must believe.
Isaiah 8:18-20 King James Version (KJV) Behold, I and the children whom the Lord hath given me are for signs and for wonders in Israel from the Lord of hosts, which dwelleth in mount Zion. And when they shall say unto you, Seek unto them that have familiar spirits, and unto wizards that peep, and that mutter: should not a people seek unto their God? for the living to the dead?To the law and to the testimony: if they speak not according to this word, it is because there is no "light "in them.
I would suggest offering them light of the gospel .Not a remnant the whole.