"So, if we could all have it wrong in regards to our doctrines and it is God who decides whose doctrines are true or false, why are we on this forum debating with one another about what someone believes compared to how we see what they believe in relation to the bible? Why are some here telling others what they believe or how they believe is false if God is the one who makes that decision?"
-because truth encompasses all things that are true, and doctrine is the main way of conveying it. It is very illogical and unreasonable to say that God is truth but all these other things are just technicalities that he will overlook.
I believe truth is absolute, not relative. I seek to have a belief system that is true. I am Catholic becuase I have found answers to that question, and it is fulfilled in my belief in my Church or I would not be here.
"Some maintain that all the Christian Churches are parts forming between them the one great universal and catholic Church.
If that were so, they credit Christ with having established a very peculiar kind of Church to teach in His name. For if every Church which professes to be Christian is part of the one true Church, then this Church teaches simultaneously that Baptism is necessary for salvation, and that it is not necessary; that infants must be baptized, and that they must not be baptized; that the Pope is the antichrist, and yet he is the Vicar of Christ; that Confession is an obligation, and yet it is an abomination; that Christ is really present in the Eucharist, but at the same time is really absent. It is impossible to believe that Christ, Truth itself, and infinite Wisdome, taught such contradictory doctrines and obligations."
We discuss these things because they are very important. God is truth, anything that is not true is error, and wherever contradiction is, error is for there is only one truth.
As the above example notes, one side is Catholic and the other Protestant. Anyone may feel free to choose whichever sides, but it is impossible that both sides are correct.
"Question: If Christ came to earth today, would He not bless all the Christian churches, despite their doctrinal differences?
Answer: No. Remember that Jesus said, "I am the Truth." Truth excludes error. He founded His Church and said, "If a man will not hear the Church, let him be as a heathen (Matt 18:17). That does not sound much like a blessing. Again he said to his Apostles, "He who despises you despises Me; and he who despises Me, despises Him that sent Me" (Luke 10:16). Also, "He that is not with Me is against Me (Matt 12:30). If it is true that Sunday should be observed by Christians, would He have a blessing for the church which still insists on the Jewish Saterday? If He is really present in the Blessed Eucharist, would He be equally pleased with the doctrine of those who deny His presence there? He would say, "I do not blame those who are mistaken through no fault of their own, but I object to doctrines which deny the truth I revealed to mankind. And I cannot bless organizations devoted to the diffusion of error."
http://www.scborromeo.org/index2.htm (See Point Paper-"Is one Church as good as another?"