What is your authority to say Origen was a heretic? He said the tradition of baptizing infants is from Tradition. What reason would he have to lie? When entire households were baptized in Scripture, how do you infallibly know that infants weren't included?Yes. Origen was a heretic.
Yes. There is zero evidence in the Bible for infant baptism. What we know is that the scriptures supercede Origen and Hippolytus. One thing that is obvious in studying history is that pagan cultures added their own practices on top of the Bible. These traditions are always subservient when they conflict with the Bible. Infant baptism is a clear example of a practice added by others outside of Scripture. The teaching is anathema to God's word in regards to redemption and adoption by God.
Why did both Luther and Calvin, who went by the bible alone, believe it was in Scripture? Baptism replaced circumcision which Paul calls the "circumcision of Christ" in Col. 2:11
Speaking of baptism Peter says the promise of receiving the gift of the Holy Spirit was also "to your children".
How much evidence do you need? The Trinity isn't mentioned in Scripture so why do the words "infant baptism" have to be?
Why do you believe everything that is true must be in written scripture? Calvin asked his critics to show them one scripture which allows women to receive the Lord's Supper. It's not in the bible yet women are allowed. What not infant baptism which has always been practiced.