Protestants defect from the New Covenant for their man-made traditions.
Novus Ordo Conciliarism is not Catholic, but merely the latest Pharisaical impostor religion.
There are only two religions; Catholicism and Satanism
—Pope Leo XIII
The race of man, after its miserable fall from God, the Creator and the Giver of heavenly gifts, “through the envy of the devil,” separated into two diverse and opposite parts, of which the one steadfastly contends for truth and virtue, the other of those things which are contrary to virtue and to truth. The one is the kingdom of God on earth, namely, the true Church of Jesus Christ; and those who desire from their heart to be united with it, so as to gain salvation, must of necessity serve God and His only-begotten Son with their whole mind and with an entire will. The other is the kingdom of Satan, in whose possession and control are all whosoever follow the fatal example of their leader and of our first parents, those who refuse to obey the divine and eternal law, and who have many aims of their own in contempt of God, and many aims also against God.
Pope Leo XIII Humanum Genus, 1884 §1
Jewish Influence on Christian Reform Movements
by Rabbi Louis I. Newman,
“For the mystery of iniquity already worketh; only that he who now holdeth, do hold, until he be taken out of the way. And then that wicked one shall be revealed whom the Lord Jesus shall kill with the spirit of his mouth; and shall destroy with the brightness of his coming, him, Whose coming is according to the working of Satan, in all power, and signs, and lying wonders, And in all seduction of iniquity to them that perish; because they receive not the love of the truth, that they might be saved. Therefore God shall send them the operation of error, to believe lying: That all may be judged who have not believed the truth, but have consented to iniquity.” 2 Thessalonians 2:7-11