Tell me how I can legitimately make someone else deserving of punishment for something they didn't do.
And you didn't answer my question. Why do you think they are right? What makes their opinion better than anyone else's? They were fallible men, how do you know they didn't make a mistake?
You're thinking of sin and punishment in an entirely nominalistic/voluntaristic/legalistic way, as if it has nothing to do with the corruption of our nature. Adam's sin corrupted his nature, and he passed that corrupted nature on to his descendants. That is why children die even before they have ever committed a sin. That is why children are now [by secondary nature] disposed/inclined to sin from their infancy.
And you didn't answer my question. Why do you think they are right? What makes their opinion better than anyone else's? They were fallible men, how do you know they didn't make a mistake?
Christ promised to guide His Church into all truth. This is why we trust the Apostles, the writings of the Apostles, the bishops ordained by the Apostles, those in succesion from them, and decisions of such bishops when, for example, they selected the canon of the New Testament. If you don't trust the bishops or the Apostles, then you would know nothing about Christ and the gospel. The authority and trustworthiness of the Apostles and bishops is itself part of the gospel.
-A8