“He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God.” John 3:18

The only sin that can send anyone to hell is unbelief.  All other sins can be forgiven.  God has made provision for forgiveness of our sin through the substitutionary death, burial, and resurrection of His Son Jesus Christ.  The only sin that will keep one from accessing that provision of salvation and forgiveness in Christ alone is the sin of unbelief.

Is an infant capable of committing the sin of unbelief?  If not, then what is the purpose for baptizing infants?  

No one goes to hell for Adam’s sin.  The only sin that can keep one from accessing God’s grace for salvation and forgiveness is the sin of unbelief (John 3:18).

• No parent wants their child to be unforgiven and separated from God.  Most parents would gladly paint themselves with purple polka dots if their spiritual leaders said it was necessary to keep the child out of hell.  The problem is that the Bible gives no precedent or instruction for purple polka dots or infant baptism.  
• Parents expect their spiritual leaders to give them good instruction, rightly dividing the word of truth.  The Bible is the foundation for all we know concerning Christianity.  Without the Scriptures there would be no basis for Christianity.   Church tradition that violates biblical truth is heresy and is a violation of a sacred trust between the people, their spiritual leaders and God.  
• The Holy Spirit is the author of Scripture and He never contradicts Himself.  He is God and He cannot lie.  Christians are supposed to be people of the Book.  That is why Christians need to read the Bible and study it for themselves, comparing spiritual things with spiritual.  “Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets are gone out into the world.” I John 4:1