Rabid catholics have this delusion that the historic true church was the 'roman' faith when it grew into the church/state power, and that the 'reformers' were somehow separted from truth, but in reality the 'reformers' were going back to the true faith as existed before the 'roman' faith, such as in the vaudois, and those persecuted into the wilderness, who still held to the bible. It was the 'roman' faith that separated itself from truth (and one can even as the eastern 'orthodoxy', how they feel about it, also in 1054), read - The Two Republics -
The two republics;
The true church, never separated from anyone, but as we see, there was a Jezebel amidst the true, teaching people to sacrifice to idols:
Rev 2:19 I know thy works, and charity, and service, and faith, and thy patience, and thy works; and the last to be more than the first.
Rev 2:20 Notwithstanding I have a few things against thee, because thou sufferest that woman Jezebel, which calleth herself a prophetess, to teach and to seduce my servants to commit fornication, and to eat things sacrificed unto idols.
Rev 2:21 And I gave her space to repent of her fornication; and she repented not.
Rev 2:22 Behold, I will cast her into a bed, and them that commit adultery with her into great tribulation, except they repent of their deeds.
Rev 2:23 And I will kill her children with death; and all the churches shall know that I am he which searcheth the reins and hearts: and I will give unto every one of you according to your works.