There’s no doubt. They don’t even hide their idolatry. The whole system is a damning mixture of truth and abominable lies.
All Catholics need to read the materials and watch the videos at Berean Beacon. It is the online ministry of former priest, Richard Bennett. He was born in Ireland to a devoutly Catholic family and served as a priest for more than two decades before he became a Christian. A good place to start might be:
Who is Your Holy Father?
http://www.bereanbeacon.org/#/pope-to-pontificate-in-the-usa/
The difficult thing is to share what Christ wants to do and can do, without getting full of oneself in the process.
When coming from a Roman Catholic background, which says “Oh look what a wonderful system WE have” and then finding a personal saving Christ, the temptation in the new congregation is to continue the underlying folly and say once more “Oh look what a wonderful system WE have.”
It’s not until we’ve dropped the ball badly enough that we come around to saying “Oh look what a wonderful system the LORD has.” And being able to trace it where it appears in each segment of Christendom.