An alternate deity, an alternate focus of worship and adoration, an alternate source of revelation, an alternate channel for accessing transcendent reality with our prayers -- and you don't smell a rat?
Perhaps, the issue at stake here is the authority of Rome. This is a loyalty test. Those who humble their necks beneath the yoke of the papacy prove the sincerity of their submission by embracing something they should know to be ridiculous.
I've studied cults for a few decades, now, and what I see in the cult of the BVM is demonic. Tarted up in religious verbiage and weasel words, but ultimately channeling human fealty away from God and towards one who desperately wants it -- and wants it badly enough to accept it while wearing a mask. Then, perhaps "at the hour of our death," when it's too late, the mask slips off ... and the Marian devotee falls into the embrace of that luminous angel, Lucifer.
Thank you for your interesting post, especially the last paragraph. Your sentiments are by no means unusual, as I am sure you know. They are an excellent example of anti-Catholic bigotry.
So, you think the devil can tell people to return to God and to pray, believe in Jesus, and repent of sin? If you had really studied apparitions of the Blessed Virgin and what she says, you would know that is her message. There is no way the devil can say those things, so your assertion that Marian devotion is demonic is really stupid.