You probably will not like this answer, but I say to just read the Bible.
skep, it is not a matter of whether I like the answer you give. It is a matter of whether the answer you give is actually informative. Often times I do not like answers, but they are reality and reality is what I have to deal with. Your answer, however, is not reality. It does not break the tie. It does not show how you are right and they are wrong.
For one, the bible was never intended to be the authority. Neither jesus H, Paul nor any of the other church founders wanted to fetishize the bible as protestants have. Sola scriptura was an invention of Luther, nearly 1500 years after jesus H, without any kind of justification. Not even the bible supports sola scriptura, because there was no bible before the church.
I have made the analogy before, and since you love analogies, the bible is to xianity as the menu is to a restaurant. It is instructive and supportive and helps communication between the customers and the kitchen. The menu does not and cannot come before the restaurant. The restaurant is not beholden to the menu. The menu serves the restaurant and the customer, not the other way around.
Luther, et al, were and are idolaters, with the bible as their idol. Heh. The bible is Mammon, in a way.
Secondly, and more importantly, the bible is not crystal clear and requires a special interpretation. A perspective. An agenda. It is highly susceptible to personal preferences and requires
you make choices on how to interpret it. We call this SPAG.
One may argue just about any side of any theological argument using the bible. And pretty much every side has done this since the bible was pieced together. Both sides of slavery used the bible to support their case. You could use the bible to support the concept of hell as a fiery place of torture or simply as being apart from god. There are plenty of other examples.
So it is not that I dislike your answer. It is that your answer is not actually an answer. You may think it is. But if you do, you are mistaken.
Even if you don't believe in God, you can still read the bible and say "Wow, none of the stuff the Catholic Church practices is in the Bible." I mean, it's right there on the pages written in English.
Even if true, irrelevant. The bible was not assembled with the goal of it being the final word on anything. It was not even a completed product until hundreds of years
after jesus H was strung up. And even then, it was not considered immutable or set in stone. The bible was the product of the church. As such, the church could and did alter what books it considered canon. Like a restaurant changing the menu.
I can understand asking for rock solid proof of demons, but the proof that the Catholic Church is not Christian can easily be proven by reading the bible.
That is true only if you have already taken on all the assumptions and perspectives of your particular (heretical) cult. An outsider (or catholic) would think you are delusional. And from a historical perspective, you claiming the RCC is not xian is ridiculous and plain bigotry. It and the Eastern church defined xianity for 1400 years. Protestants are the new kids on the block. Them claiming to be "the real deal" one and a half millennia
after jesus H bit the dust is just laughable.