As for your argument, I suppose I'd first say that just because the cathedrals and the infant baptisms aren't in the Bible, doesn't mean they are bad. The big beautiful buildings are a testament to people's faith in God, which is evident in our godless culture where ugly architecture reigns supreme. That, nor the other things you mentioned, are by no means explicitly against the Bible. Every Church doctrine has Biblical support, whether you agree with the Church's interpretation of the verses or not.

There's a lot and I'll go with this one for the reply. I mentioned Cathedrals specifically because in Acts 2 they met in each other's houses but for no other reason than to show the roots of the foundation of the church was not this grand unveiling of physical things but was spiritual.

As for infant baptisms, this was something that came about later which I do believe is a contradiction against scripture as everyone in scripture who is baptized is cognizant. They have committed sin, they want to pledge their lives to God and receive forgiveness of their sins. Then they are baptized and receive the indwelling of the Holy Spirit. An infant does not have the capability nor the understanding or even the vocabulary to confess Jesus as the Son of God, repent of their sins, or sin to begin with. Then also the sprinkling of water is never authorized in scripture. Baptism is defined as immersion. Hence all of the bodies of water used in the scripture to baptize people. Never a cup or glass of water to pour it.

I know the catholic church believes all babies are born with sin and call it "original sin" I do not understand what scripture is used to say this is true. However if it were, would not Jesus have a hard time telling his disciples to "be like these little children or you will by no means enter the kingdom of Heaven."?

As for heliocentrism and the pope. It very much was wrong in the eyes of the pope to say that heliocentrism was right. And it was considered doctrinally wrong. To the extent of them banning books and arresting people with them to include Copernicus. Galileo used scripture to prove he was not wrong but the pope would not listen to him. This is why I say...this should flag the pope as a fraud. Please see below. https://web.archive.org/web/20070930013053/http://astro.wcupa.edu/mgagne/ess362/resources/finocchiaro.html#conreport

I have no doubt in my mind that Jesus set up his church. I have no doubt that it started on the day of Pentecost. But where I disagree is the order of the catholic church which came about after the council of Nicea. A group of honest people seeking God in truth, a house, a bible, wine/grape juice and unleavened bread are truly all God needs for his church for this is how it existed for many years after its founding. The writer of Hebrews attests to those who lived in caves and the wilderness due to persecution who the world was not worthy of.