In the latter times right up to the Reign of Antichrist, the enmity between the children of Mary and the children of the Devil will intensify. St. Louis de Montfort: "Mary must become as terrible as an army in battle array to the devil and his followers, especially in these latter times. For Satan, knowing that he has little time - even less now than ever - to destroy souls, intensifies his efforts and his onslaughts every day. He will not hesitate to stir up savage persecutions and set treacherous snares for Mary's faithful servants and children whom he finds more difficult to overcome than others.
It is chiefly in reference to these last wicked persecutions of the devil, daily increasing until the advent of the reign of anti-Christ, that we should understand that first and well-known prophecy and curse of God uttered against the serpent in the garden of paradise. It is opportune to explain it here for the glory of the Blessed Virgin, the salvation of her children and the confusion of the devil. 'I will place enmities between you and the woman, between your race and her race; she will crush your head and you will lie in wait for her heel' (Gen. 3:15).
God has established only one enmity - but it is an irreconcilable one - which will last and even go on increasing to the end of time. That enmity is between Mary, his worthy Mother, and the devil, between the children and the servants of the Blessed Virgin and the children and followers of Lucifer.
Thus the most fearful enemy that God has set up against the devil is Mary, his holy Mother. From the time of the earthly paradise, although she existed then only in his mind, he gave her such a hatred for his accursed enemy, such ingenuity in exposing the wickedness of the ancient serpent and such power to defeat, overthrow and crush this proud rebel, that Satan fears her not only more than angels and men but in a certain sense more than God himself. This does not mean that the anger, hatred and power of God are not infinitely greater than the Blessed Virgin's, since her attributes are limited. It simply means that Satan, being so proud, suffers infinitely more in being vanquished and punished by a lowly and humble servant of God, for her humility humiliates him more than the power of God. Moreover, God has given Mary such great power over the evil spirits that, as they have often been forced unwillingly to admit through the lips of possessed persons, they fear one of her pleadings for a soul more than the prayers of all the saints, and one of her threats more than all their other torments." True Devotion, Nos 50 - 52).
The Spotless Virgin, the Immaculata, has a special "ingenuity" in exposing the Devil's plans and tactics. Which is why the Devil often uses others - sometimes other Catholics - to try to influence us to abandon our devotion to Mary, or at least to water it down under the pretext that it is "excessive" or "harmful to ecumenism."
The Devil knows that those consecrated to the Immaculata will be protected in a special way in this time of Apostasy. Which is why he attacks their true devotion. Again St. Louis de Montfort: "Since Mary alone has crushed all heresies, as we are told by the Church under the guidance of the Holy Spirit (Office of B.V.M.), a devoted servant of hers will never fall into formal heresy or error, though critics may contest this. He may very well err materially, mistaking lies for truth or an evil spirit for a good one, but he will be less likely to do this than others. Sooner or later he will discover his error and will not go on stubbornly believing and maintaining what he mistakenly thought was the truth." (True Devotion, No. 167),
In other words, those who practice true devotion to Mary will be better disposed toward the truth and will receive special graces against error.
The Devil knows this. So he tries desperately to undermine such true devotion: "It's harmful to ecumenism," "It is excessive," "It is too pre-Vatican II," "It is Medeival." Don't you believe the lies. Consecrate yourself daily to the Immaculata. Pope John Paul II, in a General Audience of November 15, 1995, said that to honor Mary is to go to Jesus. How then can our devotion to Mary be said to be "excessive"? During the same General Audience, the Holy Father places "such as Lourdes, Fatima, Loreto, Pompei, Guadalupe and Czestochowa" [this list is not exhaustive]...are "a wonderful testimony to God's mercy, which reaches man through Mary's intercession.."
Yes the Devil knows this too well. And so he persecutes the faithful servants of Mary (as opposed to those whose devotion to Mary is not authentic - see True Devotion to Mary, 188). In my own parish, I cannot even participate in the Rosary without being attacked. I am not permitted to participate in parish ministry. I cannot even have a Mass said for my father. St. Louis de Montfort explains, "...sinners continually hate and persecute the elect, openly and secretly. The elect are a burden to them. They despise them, criticize them, ridicule them, insult them,, rob them, deceive them, impoverish them, hunt them down and trample them into the dust; while they themselves are making fortunes, enjoying themselves, getting good positions for themselves, enriching themselves, rising to power and living in comfort." (True Devotion to Mary, 190).
Infected by a self-centered spirit and a silly parochialism, some within the Church would exclude those with a true marian devotion, decreeing thereby that there is not room for such within the Mystical Body of Christ. And in so doing, they make themselves enemies of Christ Jesus Himself!