A blanket write off of all Catholics as idolaters, because of the nature of their worship services is not correct.
If they are not in fact worshipping Mary in their hearts, but only conforming to the traditionally order of religious service, then they are no different from Naaman the Syrian who assisting the king for religious service in pagan temples.
If they confess Jesus only in the hearts and do not confess Mary with Him as 'Mother' of God, then they have holy earth of Christ beneath their knees to worship upon:
And Naaman said, Shall there not then, I pray thee, be given to thy servant two mules' burden of earth? for thy servant will henceforth offer neither burnt offering nor sacrifice unto other gods, but unto the LORD.
In this thing the LORD pardon thy servant, that when my master goeth into the house of Rimmon to worship there, and he leaneth on my hand, and I bow myself in the house of Rimmon: when I bow down myself in the house of Rimmon, the LORD pardon thy servant in this thing.
God sees the heart first, and the flesh profits nothing.
If I were raised in such a case, and knew that 'Mariology' was only dumb sacred traditions and no truth in Christ, then I wouldn't necessarily need depart the catholic services of my fathers, but would speak of Jesus only, without 'offending' Mary openly, and let my testimony and life and Christ persuade others to the true common salvation of the common faith.
Those who see and believe for themselves, as them upon hearing the converted Samaritan woman, they would come out from Mystically 'Sacred' Babylon worship, while not needing separate themselves from Catholic religious services and society.
I.e. not necessarily needful to isolate family and friends and beloved companions of old.
I was in the same condition in the organization of churches I was saved in. I remained with them in services and fellowship, without necessarily agreeing with their errors. I only ceased to participate in their worship services after physically moving for professional reasons. Many of them, including some leaders, I still call brother and sister, who do not utterly give themselves to the false doctrine that is prevailant among them.